Question

If it takes 4 men 6 hours to repair a road,how long will it take 3 men to do the same job if they work at the same rate

Answer 1

The more the men, the less time the job will take.

therefore, the less the men, the more time the job will take.

It is a case of indirect proportion, in which,

$x_{1} \times y_{1} = x_{2} \times y_{2}$

4 men × 6 hours = 3 men × y hours

therefore y hours =

$\frac{4 \times 6}{3} = 8$

Therefore, it will take 8 hours to repair a road by 3 men.