Question

If 15 men can finish a job in 48 hours, how many men will be required to do the same job in 30 hours?

• A. 24 men
• B. 18 men
• C. 12 men
• D. 5 men

Answer 1

The correct option is A

24 men

As the number of men increases, the time required to finish the job decreases. So, they are inversely proportional to each other.

$\text{Men}\times \text{time = constant}$

Let "m" be the number of men required to do the work in 30 hours.

$⟹$ $15\times 48=m\times 30$

$⟹m=24$

So, 24 men are required to finish the job in 30 hours.