Question

If 20 men can finish a job in 48 hours, how many men will be required to do the same job in 30 hours?

Answer 1

As the number of men increases, the time required to finish the job decreases.

$Men\times time=constant$

Let "m" be the number of men required.

$20\times 48=m\times 30$

$m=32$

So, 32 men are required to finish the job in 30 hours.