### About this tutorial:

**Video duration: **15:28

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Solved examples on Time and Work dealing with ideas of proportionality, efficiency, pipes & cisterns, etc.

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Three pipes A, B and C can fill a tank in 6 hours. After

working it together for 2 hours, C is closed and A and B can

fill the remaining part in 7 hours. The number of hours taken

by C alone to fill the tank is

A, B and C together can do a piece of work in 40 days. After

working with B and C for 16 days, A leaves and then B and

C complete the remaining work in 40 days more. A alone

could do the work in

nice class

Thnk u soo much sir

PLZ ANSWER THIS IN BEST SHORT TRICKA, B AND C can do a work in 15, 20 and 30 days resp. They start the work together but after 4 days A leaves the work and after some more days B also leaves the work and rest work is done by C in 2 days. Then in how many days total work be finished ?Thanks man, really needed a refresher on my algebra. Corelation got me hard on the first 2 exams and they were simple as hell.

try to solve fast

2. A work can be completed by 40 workers in 40 days. If 5 workers leave every 10 days, how many days work will be completed.

ANSWER:

Formula : A = 100 % / 40 days = 25 % every 10 days by 40 workers

10 days = 25 % by 40 workers

10 days = 21.87 % by 35 workers

10 days = 18.75% by 30 workers

10 days = 15.62 % by 25 workers

10 days = 12.5% by 20 workers

93.74 %

100 % / 93.74% = 1.066 40 days + 10.66 = 50.66 Days

Please provide the solution of this question–

In village A, 12 men and 18 boys completed construction of a health center in 60 days, by working for 7.5 hours a day. Subsequently the residents of the neighbouring village B also decided to construct a health centre in their locality, which would be twice the size of the facility built in village A. If a man is able to perform the work equal to the same done by 2 boys, then how many boys will be required to help 21 men to complete the work in village B in 50 days, working 9 hours a day?

(1) 45 boys

(2) 48 boys

(3) 40 boys

(4) 42 boys

(5) None of these/Cannot be determined

Thank you nice way of presentation and if you don't mind what is the software used for this video

very good

not helpful

Q. A and B can independently finish a piece of work in 25 and 20 days. They started working together after few days A left . after that B could finish the remaining work in 11 days. After how many days A left the work.

kindly tell me solution to this question

not efficient…

Hi, how do you write during your presentation

Very poor teaching

Q. A and B completed a work together in 5 days. Had A worked at twice the speed and B at half the speed, it would have taken them four days to complete the job. How much time would it take for A alone to do the work?

nice video sir

finally came across a video which actually taught the type of questions that I was looking for..thanku so mch.

Very good approach used to solve such problems.

I am grateful to you 🙂

waste….

good knowledge…nice session

Some persons were assigned a work to do in 26 days .They started the work

but after 6 days, four persons were absent and remaining work was

completed in 24 days. How many persons were assigned in beginning?

1. 24

2. 20

3. 26

4. 30

6. Cannot be determined

A does 20% less work than B. If A can complete a piece of work in 15/2 hours then B can do it in how many hours?

How can solve this kind of problems

sir que no 6 ans is 36.90

Hi.gautam..i think and is 8.bcz B can do 1unit work so in remaining 3 days B can only 3 unit work so.18-3=15unit work can done by A+B.Bt in A+B do the work 3unit per day so A+B done the work together in 5 days.So Total days=5+3=8.

Please provide the link to the concept video of TIME AND WORK .

What was the software you used to write .

ur videos are very usefull fr even beginners sir..thnkx fr sharing:-))

@ravihanda… plz reply to the comments

sir can you make a playlist ??? please coz it is very difficult to watch the video in order as you said at the beginning to watch the video on basic concept of time and work but i am unable to find that so if they are in order it will be quite helpful…thankyou and at last i would like to thanxx for above awesome video…

Thanks man

Q4 it should be 12 days….they both start working together and can complete the work in 6 days. so in first 3 days they complete 1/2 of the work and then A leaves..so B will have to complete rest 1/2 of the work in 9 days so in total it takes 12 = (3 +9) days to complete.

I guess in question no 4 answer would be 12 days in total… please check and reply as I am already confused and this has made me more confuse.

answer for question 3 is 18 days not 8 days……

Sir i m learning the basics of mathematics now..please tell me how to solve with step by step example of 0.75/25*100

i know the answer is 0.03

But please help me how to solve it without calculator..

Thank you

thanks ravi…

thanku for easy explanation sir. Can u pls solve this prob, " Twenty-four men can complete a work in sixteen days. Thirty-two women can complete the same work in twenty-four days. Sixteen men and sixteen women started working and working for twelve days. How many more men are to be added to complete the remaining work in 2 day?"

Hello ,

I have one doubt in question 6 :

Let the total work to be done is 630( LCM of A,B,C):

the unit of work done by A in 1 min : 630/35 : 18

The unit of work done by B i : 14

The unit of work done by C 21

For 7 mins the work done will be 7*(18+14)/630 = 224/630

The amount of work left is 1-224/630 = 406/630

now the total time taken will be = (18+14-21)t/630=406/630

t=406/11

t= 37 days approx

can you please tell me where my logic is wrong

Thanks sir u are simply awesome

till we get 72bd i understand in third problem.after that why u are dividing it by 3.5 b..can u pls explain it?

IN 2ND QUESTION U TOOK 60 DAYS…..BUT IT WAS ONLY 40DAYS OF WORK IN THE QUESTION???

Excellent….awesome explanation

good

can i know y u took that x at the bottom of y in the first problem..

Plzzzzz

I think #3 is wrong

It should be 5B not 3.5B

good

Man u are brilliant…. Thanks for helping people…. really Appreciable…..

great

excellent tutorial! thanx a lot!