Question

If 20 men can complete a work in 40 days, then when should 4 men leave the work so that the whole work can be completed in 48 days?​

Answer 1

Answer:

The total number of days require to complete the work =20×40=800 days.

i.e. a single man can complete the work in 800 days.

Let x be the number of days after which 4 men leave the work.

So,

20x+16(48−x)=800

or, 20x+768−16x=800

or, 4x=32

or, x=8

Hence, If 4 men leave the work after 8 days it may be finished in 48 days.