Question

A certain number of men can finish a piece of work in 100 days. If however there were 20 men less it will take 20 days more for the work to be finished. How many men were there originally?

Answer 1

let , the number of men is x.

100x/120 = x - 20

10x/12= x - 20
10x = 12x - 240
2x =240
x = 120

there were 120 men.

Answer 2

Answer:

There are 120 men

Step-by-step explanation:

let , the number of men is x.

A certain number of men can finish a piece of work in 100 days

Work done = 100x

there were 20 men less it will take 20 days more for the work to be finished.

So, Number of men =x-20

No. of days =120

Work done = 120(x-20)

100x=120(x-20)

$\frac{100}{120}=x-20$

$x=120$

Hence there were 120 men.