Question

25 men finish a work in 10 days.20
men will finish it in.... days.​

Answer 1

Answer:

In the first 10 days, 25×10=250 'man-days. ... For the next 10 days there are only 20 men. The amount of work completed is: 20×10=200 'man-days'. There are then 15 men left to complete the remaining amount of work

Step-by-step explanation:

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Answer 2

Answer:

We are working with inverse proportion where, as the number of people decreases, the time taken to finish a task will increase.

Find the constant first.

x × y=k

The total task requires

25×20=500 'man-days'

In the first 10days,

25×10=250'man-days.', which means that the task is half completed.

For the next 10days there are only 20men.

The amount of work completed is:

20×10=200'man-days'.

There are then 15men left to complete the remaining amount of work.

500−250−200=50 'man-days'

The work can be completed in:

50/15=3(1/3)days

The total time taken is therefore

10+10+313days

The work will be completed on the 24th day.