CURRENT AFFAIRS JANUARY 2022 TO OCTOBER 2022

 CURRENT AFFAIRS JANUARY 2022 TO OCTOBER 2022 

In This post  we discussed about CURRENT AFFAIRSJANUARY 2022 TO OCTOBER 2022  . This  is very important for the competitive exams and also for knowledge about  current affairs  . Thank you visit our website 

Every government entrance test, including those for the SSC, UPSC, Railways, and Banking, includes a subject on current affairs. Everyone studying for the upcoming examinations in 2022 needs to be well-prepared for this area. For all competitive tests, our professionals create the current affairs. Current Affairs 2022 for Banking Exams SBI Clerk, SBI PO, IBPS PO Clerk, RBI, RRB and more for UPSC, SSC, IAS, Railway-RRB, UPPSC, UKPSC, TNPSC, MPPSC & Other State Government Jobs / Exams. Continue reading the daily and monthly updated GK facts and current events on this page. Keep up with current events in your nation and throughout the world as you prepare for forthcoming government exams.

~:National Appointments:~ 

 1. 15th President of India - Droupadi Murmu

 2. 14th Vice President of India -Jagdeep Dhankar

 3. Secretary to President - Rajesh Verma

 4. Advisor to PM Narendra- Tarun Kapoor

 5. Director in PM Office - IFS Officer Shweta Singh

 6. Attorney General of India - R Venkataramani

 7. Chief Economic Advisor of India - V Anantha Nageswaran

 8. Scientific Adviser to Defence Minister  - G Satheesh Reddy

 9. Foreign Secretary - Vinay Mohan Kwatra 

10. Revenue Secretary - Sanjay Malhotra

11. Defence Secretary - Aramane Giridhar 

12. Chairman of CBDT - Nitin Gupta 

13. Chairman of UPSC - Manoj Soni 

14. Chairman of SSC - S. Kishore

15. Chief Election Commissioner - Rajiv Kumar

16. Deputy Election Commissioner - Ajay Bhadoo

17. Central Vigilance Commissioner - Suresh N Patel

18. Controller General of Accounts - Bharati Das

19. CEO of NITI Aayog - Parameswaran Iyer 

20. Vice Chairman NITI Aayog - Suman K Bery

21. Director of IB - Tapan Kumar Deka

22. Director General of the NIA - Dinkar Gupta

23. Chief of R&AW - Samant Kumar Goel.

24. Chairperson of CBSE - Nidhi Chibber

25. Director of NCERT - Dinesh Prasad Saklani 

26. 1st Woman Director General of the CSIR - Nallathamby

27. Chairperson of the Press Council of India Desai - Justice (Retd) Ranjana Prakash

28. Principal Director General of the Press Information Bureau (PIB) - Satyendra Prakash

29. Chairman of Broadcast Audience Research Council - Shashi Sinha

30. CEO of Sansad TV - Utpal Kumar Singh 

31. Director General of National Informatics Centre - Rajesh Gera 

32. CEO of Prasar Bharati - Mayank Kumar Agrawal

33. Director of Vikram Sarabhai Space Centre - S Unnikrishnan Nair

34. Chairman of ISRO - S Somanath 

35. Chairman of DRDO - Dr. Samir V Kamat

36. Chairman of In-Space - Dr. Pawan Kumar Goenka

37. Director General of the Geological Survey of India - S Raju 

38. Director of Forest Research Institute - Renu Singh 

39. Chairman of Khadi & Village Industries Commission (KVIC)  - Manoj Kumar

40. Chairman & CEO of Railway Board - Vinay Kumar Tripathi

41. Director General of the Indian Ordinance Factory - Sanjeev Kishore

42. Delhi Police Commissioner - Sanjay Aroraw  

43. Executive Chairperson of the National Legal Services Authority(NALSA) -Supreme Court judge Justice DY Chandrachud 

44. CEO of Vodafone Idea - Akshay Moondra

45. Chairman of Vodafone Idea - Ravinder Takkar

46. MD of Bharti Airtel - Gopal Vittal

47. CEO of JioSaavn - Sahas Malhotra 

48. Chairman of Reliance Jio - Akash Ambani

49. MD and CEO of Paytm - Vijay Shekhar Sharma

50. CEO of Paytm Payments Services Ltd - Nakul Jain

51. Chief Financial Officer BharatPe - Nalin Negi 

52. MD of the Delhi Metro Rail Corporation - Vikas Kumar

53. MD of National High Speed Rail Corporation Limited - Rajendra Prasad

54. Chairman & MD of RailTel Corporation of India - L Sanjai Kumar

55. Chairman of Air India - N Chandrasekaran

56. MD & CEO of Air India - Campbell Wilson

57. CEO of Jet Airways - Sanjiv Kapoor 

58. Chairman of ONGC - Rajesh Kumar Srivastava 

59. MD of ONGC Videsh - Rajarshi Gupta

60. Chairman & MD of GAIL - Sandeep Kumar Gupta

61. Chairman and MD of Oil India Ltd - Ranjit Rath

62. Chairman & MD of Hindustan Petroleum Corporation Ltd  - Pushp Kumar Joshi

63. Chairman of Atomic Energy Commission  - Kamlesh Nilkanth Vyas

64. Chief Financial Officer of Power Grid Corporation - Pramod Kumar 

65. Chairman of Nasscom - Krishnan Ramanujam

66. President of Confederation of Indian Industry CII- R Dinesh

67. MD & CEO of National Stock Exchange (NSE) - Ashish Kumar Chauhan

68. Chairman & MD of Goa Shipyard Limited (GSL) - Brajesh Kumar Upadhyay

69. Chairman & MD of Shipping Corporation of India - Binesh Kumar Tyagi

70. Executive Vice-President & Head of Disney + Hotstar - Sajith Sivanandan

71. MD & CEO of Infosys - Salil Parekh

72. CEO of Starbucks - Laxman Narasimhan - Laxman Narasimhan

73. Director of AIIMS Delhi - Dr. M Srinivas

74. Director General of the Indian Council of Medical Research - Dr. Rajiv Bahl

75. Chairman of Pfizer India - Pradip Shah

~:Defence Appointments:~

 1. Chief of Defence Staff (CDS) of India -Lt. General Anil Chauhan

 2. Chief of the Army Staff - General Manoj Pande

 3. Chief of the Air Staff - Air Chief Marshal VR Chaudhari

 4. Chief of the Naval Staff - Admiral R Hari Kumar

 5. Vice Chief of Indian Army - Lt Gen Baggavalli Somashekar Raju

 6. Director General of ITBP - Anish Dayal Singh

 7. Add. Charge of Director General of the Sashastra Seema Bal - Anish Dayal Singh 

 8. Director General of the Central Reserve Police Force (CRPF) - Sujoy Lal Thaosen

~:Chief Ministers:~ 

1. CM of Tripura - Manik Saha 

2. CM of Maharashtra - Eknath Shinde 

3. CM of Punjab - Bhagwant Singh Mann 

4. CM of Manipur - N Biren Singh

5. CM of Uttarakhand - Pushkar Singh Dhami

6. CM of UP - Yogi Adityanath

7. CM of GOA - Pramod Sawant

~:Governor:~ 

1. Lt. Governor of Delhi -Vinai Kumar Saxena

2. Governor of Meghalaya ( Additional charge) - BD Mishra 

~:Chief Justice:~ 

 49th Chief Justice of India - Justice Uday Umesh Lalit  

 Delhi High Court - Satish Chandra Sharma

 Guwahati High Court - Rashmin M Chhaya

 Himachal Pradesh High Court - Amjad A Sayed

 J&K High Court - Ali Mohammad Magrey 

 Karnataka High Court - Prasanna B. Varale

 Rajasthan High Court - Pankaj Mithal

 Telangana High Court - Ujjal Bhuyan

 Uttrakhand High Court - Vipin Sanghi

~:International Appointments:~ 

1. Chief Operating Officer of Meta - Javier Olivan

2. Chief Economist of World Bank - Indermit Gill

3. India's Executive Director at the International Monetary Fund (IMF) - Krishnamurti Subramanian 

4. Director of the Asia and Pacific Department (APD) of International Monetary Fund (IMF) - Krishna Srinivasan

5. MD & CEO of Mercedes Benz - Santosh Iyer

6. G20 Sherpa (India)  - Amitabh Kant

7. G20 Chief Coordinator (India)  - Harsh Vardhan Shringla

8. First Ever Chief Technology Officer of CIA  - Nand Mulchandani

9. First Black woman on US Supreme Court - Ketanji Brown Jackson

10. Vice President of International Astronautical Federation - ISRO Scientist Anil Kumar

~:India's Ambassador/Commissioner to Other Countries:~ 

1. India's Ambassador to Bhutan  - Sudhakar Dalela  

2. India's Ambassador to Thailand - Nagesh Singh

3. India's Ambassador to the Republic of Madagascar- Bandaru Wilsonbabu

4. India's Ambassador to China - Pradeep Kumar Rawat

5. India's Ambassador to Japan - Sibi George

6. India’s Ambassador to Kuwait - Dr Adarsh Swaika

7. India’s High Commissioner to Bangladesh - Pranay Verma

8. India's High Commissioner to UK - Vikram Doraiswami

9. India's High Commissioner of to Canada - Sanjay Verma

~:President:~ 

1. President of South Korea  - Yoon Suk-Yeol

2. 1st Female President of Hungary - Katalin Novak

3. President of UAE - Sheikh Mohammed bin Zayed Al Nahyan 

4. President of Sri Lanka - Ranil Wickremesinghe

5. President of Kenya - William Ruto 

6. President of Iraq - Abdul Latif Rashid

~:Prime Ministers:~ 

1. PM of Sri Lanka - Dinesh Gunawardena 

2. PM of France - Elisabeth Borne 

3. PM of Australia - Anthony Albanese 

4. PM of Israel - Yair Lapid 

5. PM of Pakistan - Mian Muhammad Shehbaz S 

6. PM of United Kingdom - Rishi Sunak

7. First woman PM of Italy - Giorgia Meloni

8. PM of Saudi Arabia - Mohammed bin Salman

~:Brand Ambassadors:~ 

1. First Indian Brand Ambassador of Louis Vuitton - Deepika Padukone

2. UNICEF's Goodwill Ambassador -  Sachin Tendulkar

3. Ambassador of British Council's 'India - 'UK Together Season of Culture' - AR Rahman 

4. Brand Ambassador of PokerBaazi.com - Shahid Kapoor

5. Brand ambassador for Noise New Smartwatch - Vaani Kapoor

6. Brand Ambassador of Uttarakhand - Rishabh Pant

7. Brand Ambassador of Up Grad - Amitabh Bachchan

8. Brand Ambassador of Garuda Aerospace - M S Dhoni

9. Brand Ambassador of Limca Sportz promotion - Neeraj Chopra

10. Brand Ambassador Of T20 World Cup For The Blind - Former Cricketer Yuvraj Singh

Probability Mathematic

  Probability Mathematic 

Probability:- Probability  means the chances of happening/occurring of an event. So, in this chapter we discuss about the Probability of an event to happen/occur. We usually predict about many events based on certain parameters.

Probability can be used to predict the likelihood of an event occurring, and can be used to make decisions about how to best manage risk. Probability theory is a powerful tool that can be used to help us understand the world and make better decisions.

example, if you roll a dice 100 times and it lands on a 4 20 times, then the experimental probability of rolling a 4 is 20%.

For example :-

♦ Getting a head or tail, when a coin is tossed . 

♦ Getting a number from 1 to 6, when a die is rolled . 

The better we know about the parameters related to an event better will be the accuracy of the result predicted. Mathematically, we can say that probability of happening an event is equal to the ratio of number of favourable outcomes to number of possible outcomes. It is represented as shown below Probability happening of an event

 P = Number of favourable Outcomes / Total Number of possible Outcomes 

Terms Related to Probability :-

Various terms related to probability are as follows

Experiment

An action where the result is uncertain even though the all possible outcomes related to it is known in advance. This is also known as random experiment, e. g., Throwing a die, tossing a coin etc. 

Sample Space 

A sample space of an experiment is the set of all possible outcomes of that experiment. It is denoted by S. For example If we throw a die,

 then sample space S = {1, 2, 3, 4, 5, 6} If we toss a coin, then sample space S = {Head, Tail}

Possible outcomes

All possibilities related to an event are known as possible outcomes. 

Tossing a Coin When a coin is tossed, these are two possible outcomes. 

So, we say that the probability of getting H is 1/2 or the probability of getting T is 1/2, 

Throwing a Die When a single die is thrown, there are six possible outcomes 1, 2, 3, 4, 5 and 6

The probability of  getting any one of this numbers is 1/6

Ex.1:-

 There are 5 marbles in a bag. 3 of them are red and 2 of them are blue. What is the probability that a blue marble will be picked?

 Answer :- Number of favourable outcomes = 2 (because there are 2 blue marbles) Total number of outcomes = 5 (because there are 5 marbles in total).

So required Probability is = 2/5 = 0.4 

👉 Event

 Event is the single result of an experiment, e. g., Getting a head is an event related to tossing of a coin. 

Types of Events

 Various types of events are as follows

 Certain and Impossible Events

 A certain event is certain to occur, i.e., S (sample space) is a certain event. Probability of certain event is 1, i.e., P[S) = 1. 

An impossible event has no chance of occurring, i.e., § is the impossible event. Probability of impossible event is 0, i. e., P (0) = 0.

 Ex. 2:- A teacher chooses a student at random from a class of 30 boys. What is the probability that the student chosen is a boy?

Answer:- since all the students are boys so, chosen may be any one ,

 i.e. favourable cases = Total cases = 30

 Probability = 30/30 = 1

Ex. 3:- A bag contains 20 black marbles, if a marble is picked at random from the bag. Find the probability that marble picked is of Red colour .

Answer:-. The bag contains 20 black marbles and there is no red marble in the bag

         So favourable cases = 0 Total outcomes = 20

 Required Probability = 0/20 = 0 

Equally Likely Events

 Events related to an experiment are said to be equally likely events, 

if probability of occurrence of each event is same. 

👉 For example When a dice is rolled the possible outcome of getting an odd number = possible out come of getting an even number = 3.

 So getting a even number or odd number are equally likely events.

Complement of an Event 

 The complement of an event A is the set of all outcomes in the sample space that are not included in the outcomes of event A. The complement of event A is represented by A (read as A bar).

 The probability of complement of an event can be found by subtractina the given probability from 1  

Mutually Exclusive and Exhaustive Events

♦ Two events E± and E2 related to an experiment E, having sample space S are known as mutually exclusive, if the probability of occurrence of both events simultaneously is zero.

👉 i. e.,

P(E1nE2)=Q For example When a coin is tossed either head or tail will appear. Head and tail

con not occur simultareously. Therefore occurrence of a head or a tail are two mutually exclusive events.

■f Two events E1 and E2 related to an experiment E, having sample space S are known as mutually exhaustive, if the probability of occurrence of event E1 or E2 isl.

i.e., P{E1<uE2)=l

For example Let A be probability of getting an even number when a dice is rolled and B be the

probability of getting an odd number. The probability of occurrence of event A or event B is 1

i.e., any of the even can occur so they are mutually exhanstive. Note Events E1, E2, E3 ■■■En

related to Sare known as

1. Mutually exclusive, if P (Er n E2 n£3-n£n) = 0 orE: nE2 r\E3 ■•■En = 0

2. Mutually exhaustive, if P(E1 uE2 UE3 • • • <jEn) = 1 or Et u E2 u E3 ■■■En = S

Dependent Events 

Two events are called dependent, if the outcome or occurrence of the first affects the outcome or occurrence of the second, so that the probability is changed.

Independent Events

 Two events A and B are called independent, if occurring or non-occurring of A does not affect the occurring or non-occurring of B. If A and B are independent events,

 then P (A and B) = P {AnB) = P(A)-P (B)

 For example, getting head after tossing a coin and getting a 5 on a rolling single 6-sided die are independent events.

 

Simple And Compound Interest Mathematic

 Simple And Compound Interest Mathematic 

Simple Interest :-  Simple interest is a quick and easy method of calculating the interest of the any amount in a particular time . For a normal loan and any amount deposit in bank , this mathematics normally use in banks. 

👉Like that if you give a loan to one person 100 with the interest rate of 10% for 3 year in simple interest then after the 3 you will receive the amount of 130 . that will be calculate easy by using the simple interest formulas.

FORMULA :-  I = (P*T*R)/ 100 

There, I = interest 

P = Principal Amount 

T = Time (for the how much time )

R = interest Rate 

Example :-  Raj make a deposit in bank of 1000 rupees for 3 year with a simple interest 9% . Then calculate that after 3 year how much amount will be able to withdraw by Raj ?

 (a)1230 (b)1270 (c)1250 (d)1300

Answer:-  (b)1270

Description :-   IN THIS , P = 1000 (Principal Amount )

T = 3 (Time Period )

R = 9% (Rate Of Interest )

I = ? (interest) 

There for :- I = (P * T * R) / 100

                      = (1000 * 3 * 9) / 100

                      = 270rs 

270 is the interest of the total 3 year in simple interest , That mean Raj will able to withdraw the total amount will = P + I = 1000 +270 = 1270rs 

                       

Compound Interest:-  Compound Interest that mean for a amount will receive a total amount with the interest in compound process that mean  receive the interest of the interest . 

👉Like that if you give and amount of 100 rupees to someone with the 10% compound interest for 3 year that mean for first year ta principal amount is 100 after 1 year the principle amount will be 110(principle amount + one year interest ) same also after the 2 year the principle will be 121 (new principle amount + one year interest of new principle amount ) same also after 3 year total amount will be receive by you will be 133.1rs .

 FORMULA :- A = P(1+R/100)^T

 A = Principle amount + compound interest 

P = Principle Amount 

R = Rate of interest 

T = Time period 

I = Interest = A - P

Example :- Ram take e  loan of 12000 with  12% compound interest for 3 year . after the 3 year how much amount will be paid by Ram ?

(a)16860  (b)16890 (c)16910 (d)16925

Answer :- (a)16860

Description :-  IN THIS , P = 12000 (Principal Amount )

T = 3 (Time Period )

R = 12% (Rate Of Interest )

A = ? (Principal amount + compound interest) 

There for :- A = P(1+R/100)^T

                       = 12000 (1+12/100 )^3

                       = 16859.136(Answer) 

 Some short tricks for compound interest mathematics :-

For Principal Amount of 100 rupees interest and year below there look on this and remind this with this you also able to solve the problem with some seconds 

✒ Short Tricks Formula Is :- 

👉I = P * (From the Table put the value in rate % with respected to Year )/100

Like that , An amount 12000 , with the 10% interest and the years for 2 then the compound interest of the amount will be , 

  Answer :- I = (12000 * 21)/100  [ there 21 from the table for 2years and 10% interest rate ]

                   = 2520 [that is the interest of 12000 for 2 year in compound interest ]

✅ Raj give a loan of 15000rs  to Rahim in 12% compound interest for 3 year . After 3 years how much extra amount will be paid by Rahim .

Answer :- There , P = 15000 rs 

                             R = 12%

                             T = 3 years

                             I = ? (interest amount )

                             40.49 = from the table for 12% interest rate for 3 years    

✔The interest will be , I = (P * 40.49)/ 100

                                    = (15000 *40.49) /100

                                    = 6073.5rs 

👉 Rahim Extra amount will be 6073 for compound interest.

JOB UPDATE CLICK HERE 

  

Boat and Stream-Boat and stream question and answer

Boat and Stream

Knowing the entire exam syllabus and all relevant themes is crucial for any competitive exam candidate who wants to advance in his or her career in the government sector and private sectors .we discussed about Boat and Stream:

Stream and Boat idea:

Answering queries supported the boat and stream notion involves variety of subconcepts. The four terms that a candidate must comprehend so as to understand the notion of streams area unit listed below.

Stream: -A river's flowing water is cited as a stream.

Upstream :- a ship is claimed to be moving upstream if it's moving downstream of the stream. The boat's upstream speed during this state of affairs is its web speed.

Downstream: - a ship is claimed to be moving downstream if it's occupation a similar direction because the stream. during this instance, the boat's downstream speed is its web speed.

Still Water: - during this case, the water is seen as being immobile.

 

Formula for  Boat and Stream:- 

Upstream:- (u−v) km/hr

Downstream:- (u+v)Km/hr

Speed of Boat in Still Wate:-r ½ (Downstream Speed + Upstream Speed)

Speed of Stream :-½ (Downstream Speed – Upstream Speed)

Average Speed of Boat:- {(Upstream Speed × Downstream Speed) / Boat’s Speed in Still Water}

Speed of boat or swimmer in still water:- 1/2 (Downstream Speed + Upstream Speed)

Example of Boat stream questions :

Q. If the ratio of the speed of a boat in upstream and the speed of the stream is 8 : 1. If

the boat can travel 500 km downstream in 20 hours then find the total distance

travelled by the boat in still water in the same time?

A. 425 km

 B. 459 km

 C. 441 km

 D. 450 km 

E. None of these

Q.In downstream, two steamers A and B start simultaneously from the point P but the

steamer B reaches point Q, 2 hours before the steamer A reaches the same point. If

the distance between point P and Q is 120 km and the speed of steamer B in upstream

is 3 km per hour more than that of steamer B in upstream and the speed of stream is 2

km per hour, then find the sum of the speed of steamer A in still water and that of

steamer B in still water?

A. 21 km per hour

 B. 20 km per hour

 C. 23 km per hour 

D. 27 km per hour

 E. None of these

Q.The distance between two points on a river is D km. A man rowing a boat along the

stream finds that the distance of rowing along the stream is 30 times the total

distance and when he started rowing against the stream the distance he rowed was

found 4 times of total distance. The total time taken against the stream is 10% more

than that along the stream. If the boat cover 135 km along the stream in 9 hours.

What is the speed of stream?

A. 3 km/h 

B. 3.25 km/h 

C. 3.5 km/h

 D. 2.5 km/h

 E. None of these

Q..A motorboat, whose speed in 20 km/hr in still water goes 40 km downstream and comes back in a total of 5 hours . The speed of the stream (in km/hr) is: A. 13 km/h  B. 25 km/h  C. 35 km/h  D. 20 km/h  E. None of these

Q. In one hour, a boat goes 15 km/hr along the stream and 7 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

 A. 12 km/h 

B. 10 km/h 

C. 11 km/h

 D. 09 km/h

 E. None of these

Q. A man's speed with the current is 18 km/hr and the speed of the current is 3.5 km/hr. The man's speed against the current is:

 A. 12 km/h 

B. 10 km/h 

C. 11 km/h

 D. 09 km/h

 E. None of these

Q. The speed of a boat in still water in 20 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 20 minutes is:

 A. 8 km/h 

B. 5 km/h 

C. 10 km/h

 D. 9 km/h

 E. None of these

Profit and loss In Mathematic

 

Profit and loss in mathematics

In mathematics, the price of a product on the market and an organization’s profitability are determined using the profit and loss formula. For every good, there is a selling price and a cost price. Based on the values of these prices, we can determine the profit or loss for a certain product. 

This article's main topics(Profit and loss in mathematics) include cost price, fixed, variable, and semi-variable costs, selling price, marked price, list price, margin, etc.Here, we also learn about the formula for profit and loss percentages. For instance, if a dealer’s selling price is higher than the product’s cost price, they are making a profit; if the cost price is higher than the selling price, they are losing money. 

Formula of  Profit and loss 

👉 C.P. = Cost Price (Purchasing Price + Repairing/ Maintenance Cost, {if any})

👉 S.P =  Selling Price

RULES :- 

Successive Profits :- If A sells an article to B at a% profit and B sells it to C at b% profit OR If a% and b% are two successive profits 

👉 Then , Total Profit% = {a +b+(ab/100)}%

✅ If A sells an article to B at a% profit and B sells it to C at b% profit and if C paid x .

👉 Then , The amount paid by A = X ✖{100/(100+a)}{100/(100+b)}

Successive losses :-: If a% and b% are two successive losses  (negative sign shows loss and positive sign shows profit). 

👉 Then , Total loss% ={ -a -b+(ab/100)}%

☑ If a% profit and b% loss occur, simultaneously . 

👉 Then , overall loss or profit% is = {a -b-(ab/100)}% 

✔NOTE :- (-ve sign for loss, +ve sign for profit)

☑  If a% loss and b% profit occur .

👉 Then , overall loss or profit% is = { -a +b-(ab/100)}% 

Example :-

1. Rahul sell a Fan to Rahim with 10% profit and Rahim sell the Fan to Raju with 5% profit calculate the total profit ?

(a) 14.5% (b) 15.5 % (c) 16.5% (d) 17.5%

Answer :- (b) 15.5 % [Formula:- {a +b+(ab/100)}%]

2. Raj sell a  Bag to Nabita with 12% profit  and Nabita sell the Bag to Riju with 10% profit . calculate the total profit ?

(a) 21.2% (b) 22.2% (c) 23.2% (d) 24.2%

Answer :- (c) 23.2% [Formula :- {a +b+(ab/100)}%]

3. Rita sell a  watch  to Rubi with 5% profit and Rubi sell the watch to Puja with 7% profit and right now 220 . What amount paid by Rita for buy ?

(a)195.82 (b)200 (c)193.80 (d)202

Answer :-(a)195.82 [Formula :-X ✖{100/(100+a)}{100/(100+b)}]

Time and work -Time and work in mathematics

👉 Time and work👈

Aspirants who will be taking competitive examinations for the first time or who have been preparing for the exams for some time should be aware that each subject has to receive enough time so that the concepts and fundamentals are understood. You will be better able to handle the challenging competition for each exam.We explain the concepts of time and work in this post, along with formulas that will make it easier for you to respond to inquiries. Additionally, we have a few sample time and work problems with solutions farther down in the post for your reference.

The following links will help interested candidates improve their preparation for the quantitative aptitude test.

One thing to keep in mind is that every task required a specific amount of time.

Efficiency multiply time taken equals work completed.

It means

Work completed= efficiency  x  time taken.

Basic formula for work and time:-

Rule 1: Start with days:

If a person can do a task in n days (or hours), then the task takes that individual 1/n days (or hours).

Rule 2: Days from work:

If a person's work in 1 day (or hour) equals 1/n, they will finish the task in n days (hours).

Rule - 3

If one individual is n times more productive than another, then the work done by:

First-person work to second-person work ratio is n: 1.

Ratio of times taken by First person and second person to finish a work = 1 : n.

Rule - 4

If ratio of numbers of men required to complete a work is m : n, then the ratio of time taken by them will be n : m.

Example of time and work:-

1. A can complete a task in 15 days while B needs 20. The amount of work remaining after four days of collaborative effort is:

Ans:-8/15.

2. While B can complete the same task in 12 days, A can lay railroad track between two given stations in 16 days. They completed the task in just 4 days with C's assistance. C alone can then complete the task in:

Ans:-48/5.

3. In 20, 30, and 60 days, respectively, A, B, and C can complete a task. If B and C help A every third day, how many days would it take him to complete the task?

Ans:-15 days.

4.A is thrice as economical as B and is, therefore, able to end a chunk of labor ten days prior to B. In what number days A and B can end it together?

Answer: . 5 days

Explanation: WC = 3:1

WT = 1:3

x ------- 3x

1/x – 1/3x = 1/10

x = 20/3

3/20 + 1/20 = 1/5 => five days

5.A work that may well be finished in nine days was finished three days earlier once ten additional men joined. the amount of men utilized was?s

Answer: .20 men

Pipes And Cisterns in Mathematics

 Pipes & Cisterns  in Mathematics 

This article will introduce you to the idea of pipes and cisterns as they are presented in competitive exams, as well as the kind of questions that may be given, some key formulas for answering them, and a few practise problems to help you grasp the subject better.
Candidates who intend to apply for the upcoming government sector exams should begin preparing right away because the competition is fierce and the exams are challenging to pass.
The following links provide further information on the other quantitative aptitude concepts covered in the Government exam segment for interested candidates:

✅ Basic:- Problems on Pipes and Cisterns are based on the basic concept of time and work. Pipes are connected to a tank or cistern and are used to fill or empty the tank or cistern. In pipe and cistern, the work is done in form of filling or emptying a cistern/tank.

👉Types Of Pipes :-

 ☑   Inlet pipe It fills a tank/cistern/reservoir. 

 ☑   Outlet pipe It empties a tank/cistern/reservoir.

✅Note :-  

  

 👉 If a pipe cab fill/empty a tank in 'm' h , then the part of  tank filled /emptied in 1h = 1/m . 

 

 ☑ Example : A pipe can fill/empty '1/m' part of a tank in 1 h, then the volume of tank filled in 1 h = 1/7

 👉 If a pipe can fill /empty '1/m' part of a tank in 7 h then  it can fill/empty the whole tank in 'm' h.

☑ Example : If a pipe can fill 1/5 part of a tank in 1 h then it can fill the whole tank in 5h .

👉Generally , time taken to fill a tank is taken positive (+ve) and time taken to empty a tank is taken negative (-ve). 

👉 If a pipe fills a tank in 'm' 'h' and an another pipe fills in 'n' 'h' . Then , part filled by both pipes in 1 h = 1/m +1/n.

✅Example Of The Math

👉 1. An outlet pipe can empty a cistern in 5h , In what time will the pipe empty 2/5 part of the cistern ?

✔Answer:-  Time taken to empty full cistern = 5h

                     Time taken to empty 2/5 part of the cistern = 2/5 *5 = 2h 

👉 2 If a pipe can fill a tank in 2 h and another pipe can fill the same tank in 6 h, then what part of a tank will be filled by both the pipes in 1 h, if they are opened simultaneously? 

✔Answer:-  In 1h , part filled by 1st pipe = 1/m = 1/2

                    In 1h part filled by 2nd pipe = 1/n = 1/6

                   .'. In 1h , part filled by both the pipes together = (1/m+1/n)

                                                                                                   = (1/2+1/6)

                                                                                                   = (3+1)/6 = 4/6 =2/3 part ✔ 

👉3 When opened separately, the two pipelines P and Q may fill the tank in 20 and 30 hours, respectively. How long would it take to fill the tank if both lines are opened at once?

Answer 

Pipe fills a portion of the tank. P = 1/20 in 1 hour. Pipe Q filled 1/30 of the tank in an hour.

Tank filled in 1 hour by both pipes: 1/20 + 1/30 = 5/60 = 1/12

Both will fill the tank to capacity in 12 hours.

Pipe A can fill a tank in 5 hours, while Pipe B can empty it in 8 hours, respectively. How long will it take the tank to fill halfway?