Question

12 men can reap the field in 20 days. How many men are required to reap the field in 30 days?

• A. 18 men
• B. 8 men
• C. 10 men
• D. 14 men

Answer 1

The correct option is B

8 men

The men required and the number of days taken is inversely proportion to each other.

$\begin{array}{ccc}\text{Men required}& \text{12}& \text{y}\\ \text{Number of days}& \text{20}& \text{30}\end{array}$

$⟹$ $12\times 20=y\times 30$

$⟹$ $y=\frac{12\times 20}{30}$

$⟹$ $y=8$

$\therefore$ Number of men required = 8