# Time and Work

If 12 men and 15 boys can do a piece of work in 10 days. Then in how many days can 15 men and 25 boys do thrice of this work , it being given that 3 men can do as much work in 2 hours as 5 boys can do in 3 hours.

If 12 men and 15 boys can do a piece of work in 10 days. Then in how many days can 15 men and 25 boys do thrice of this work , it being given that 3 men can do as much work in 2 hours as 5 boys can do in 3 hours.

6 man hours=15 boy hours

12m+ 15b= 45b

15m+25b=62.5b

there is 39% increase in man power

work lod increased by 200%.

time required is 21.6 days

two men and a woman are entrusted with a task. the second man needs three hours more to cope with the job than the first man and the woman would need working together. the first man, working alone, would need as much time as the second man and the woman working together. the first man, working alone, would spend eight hours less than the double period of time the second man would spend working alone. how much time would the two men and the woman need to complete the task if they all worked together?

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Alok takes m times the time taken by Bola and Chetan to complete a job. Bola takes m times the time taken by Alok and Chetan to complete the job. Chetan takes m times the time takes by Alok and Bola to complete the job. Find m.

Alok takes m times the time taken by Bola and Chetan to complete a job. Bola takes m times the time taken by Alok and Chetan to complete the job. Chetan takes m times the time takes by Alok and Bola to complete the job. Find m.

The rates at which Alok and Bhaskar work are in the ratio 5 : 4. They work on alternate days to complete a job. Bhaskar started the job and he worked on the last day. The job was completed in 1 day more than the time that Alok alone would take to complete it. Find the time taken (in days) by them working together to complete the job.

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Mr.Amit, Mr.Balu and Mr.Chand take 20 days, 30 days and 40 days respectively to complete a piece of work. If they work together, they complete another piece of work in 57/13 days. In how many days can B alone complete the second piece of work?

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@Kriti_aggarwal

Mr.Amit, Mr.Balu and Mr.Chand take 20 days, 30 days and 40 days respectively to complete a piece of work. If they work together, they complete another piece of work in 57/13 days. In how many days can B alone complete the second piece of work?

approach?

A is 50% as efficient as B. C does half the work done by A & B together. If C alone does the work n 40 days, then A,B and C together can do the work in:..?

Approach

4 examiners can examine a certain number of answer papers in 10 days by working for 5 hours a day. for how many hours a day would 2examiners have to work in order to examine twice the number of answer papers in 20days?
A. 8hrs
B.7 1/2 hrs
C. 10 hrs
D.8 8/11 hrs

p works 25 % more efficiently than Q and Q works more efficiently than R .my question is if P takes x days to complete the work then how should i find out the work done by Q and R in terms of P?

is it21.6 days..???

20 workers can finish a piece of work in 30 days. After how much days should 5 workers leave the job so that the work is completed in 35 days?

a) 5 days
b) 10 days
c)15 days
d) 20 days

Please explain the approach as well!

A takes twice the time taken by B & C together need to complete a certain amount of work, where as B takes 3 time tat of A & C taken together. If A increases his rate of doing the work by 50% and C by 80% then find how many days A,B,C together take to complete 4 times the original work tat B alone do tat work in 72 days to complete?

Pls share teh approach...

A contractor estimates that he will finish the road construction project in 100 days by employing 50 men.

However at the end of 50th day when as per his estimation half the work should have been completed , he finds that only 40% of his work is done.
How many more men should he employ in order to finish work in time?

Ahluwalia and Bimal together take 6 days to finish work. Bimal and Jalan take 10 days to finish it. what is the difference between no of days taken by ahluwalia and jalan when they worked alone to complete work

A,B,C,D can finish a work together in a certain no. of integral days. However they work two in a day and it is found that the work gets completed when (A,B), (B,C), (C,D) worked for respectively 5, 9 and 4 days or 7, 6 and 5 days. They couldn't have all together done the work in:

(1) 8 days

(1) 9 days

(1) 10 days

(1) 11 days

Please explain the approach for above question ?

The efficiency of work done by A gets reduced by 10% on each successive days he works consecutively while his efficiency spring backs to normal if he takes the rest for one day. For doing a work which takes a long time to complete he should take rest after working consecutively for every ....... to complete the work in minimum time ???????

Please explain the approach for above riddle !!

The options given are :
1) 1 day
2) 2 days
3) 4 days
4) 10 days

A and B can do a work alone exactly in 20 and 25 days respectively. However when they work together, they do 25% more work than is expected. If they work for a few days alone and for a few days together (both being integers only), then the work could not have been completed in exactly:

1) 10 days
2) 14 days
3) 16 days
4) 17 days