Question

It takes Sam 3 hours to rake the front lawn while his brother, Dave, can rake the lawn in 5 hours. How long will it take them to rake the lawn working together? Round to the nearest tenth.

Answer 1

3 hours + 5hours = 8 hours ÷ 2 =

4 hours is your answer.

Explanation:

If you have 2 people working and need to know how long it would take them to finish a job. Working together on the same job, you add each of their total hours to do the job alone,, 5 + 3 = 8, then divide the 8 by 2 people

equals 4 hours for 2 people on 1 job.