Question

A group of 6 workers can paint the walls in a house in 72 hours. How long will it take a group of 9 to complete the same job?

Let x be the number of hours that 9 workers need to complete the job

Answer 1

48 hours

Explanation:

6 workers = 72 hours

1 worker = 72×6

= 432 hours

9 workers = 432/9

= 48 hours