Question

a contracor employed 30 men to complete a pirce of work in 20 days. if he has to complete the work in 15 days, hiw any more men should he employ

Answer 1

HEY MATE HERE IS YOUR ANSWER

work=day*worker

Total work=30*38=1140

25 day work done=25*30=750

35 work done in 12 days=35*12=420

full done by both 30 +5 worker=750+420=1170

1170-1140

=30

work=day×worker

30=30×day

day=1

it's take one day more

HOPE IT HELPED YOU :)

Answer 2

Hello Friend

Here is your answer

In 20 days ,a work is completed by men = 30

In 1 day work is completed by men = 30 × 20

In 15 days work is completed by men =
$= \frac{30 \times 20}{15} \\ \\ = 40 \:$
Therefore a work is completed in 15 days , 40 men is required.

So 40 - 30 = 10 more men required.

Hope it helps you