Question

15. X number of men can finish a piece of work in 30
days. If there were 6 men more, the work could be
finished in 10 days less. What is the original number
of men?
(a) 10
(b) 11 (c) 12 (d) 15
(e) 13​

Answer 1

$answer$

Given:-

If . X number of men can finish a piece of work in 30

days. If there were 6 men more, the work could be

finished in 10 days less.

To Find :-

What is the original number  of men?

Solution :-

We may observe that the question is going in indirect proportion

Here,

30 $\times$ x = 20(6 + x)

30x = 120 + 20x

30x - 20x = 120

10x = 120

x = 120/10

x = 12