Question

7 people can pave a driveway in 9 hours. how long will it take for 11 people to pave a driveway? ​

Answer 1

Explanation:

If 7 people can pave the drive in 9 hours, we can use that information in equation form to find out how long it would take 1 person to pave the drive alone.

`(7)/(x)=(1)/(9)` and cross multiply

x = 63. That means that it would take 1 person, working alone, 63 hours to get the job done. If that be the case, and assuming that the 2 added people work at the same rate as do the first 9, we simply divide that time alone into 11 parts.

It would take 11 people
`5.\bar{27}` hours to pave that driveway.