Question

Q4) 15 men can build a wall in 42
hours, how many workers will be
required for the same work in 30
hours?​

Answer 1

Answer:

21 workers

Step-by-step explanation:

This is an example of indirect proportion. In indirect proportion products are constant.

Let x be no. of workers

Therefore,

15 * 42 = 30 * x

15 * 42 / 30 = x

42 / 2 = x

x = 21