Question

The time (t) required to do a job varies inversely as the number of people (p) working on the job.

It takes 9 hours for 4 roofers to complete a certain job. How long would it take 6 roofers to complete the same job?
hours

Answer 1

6 hours

Explanation:

Varying inversely simply means using the "inverse proportion" method

So therefore,

4 roofers= 1 hour

1 roofer= 9 * 4

= 36 hours

Why? Because the lesser amount of workers you have, the more time will be needed so as to complete the work.

6 roofers= 36/6=6 hours

The more people you have, the lesser amount of time will be spent on completing the work.