Question

It takes 3 people 4 hours to paint a wall. Assume that all people paint at the same rate. How long would it take 5 people to paint the same wall? Give your answer in hours and minutes.

Answer 1

3 hours 45 minutes

Explanation:

It takes 4 people 4 hours , then 5 people painting at the same rate will take a shorter time to paint the wall

3 → 4 hours

5 →
`(3)/(4)` × 5 =
`(3(5))/(4)` =
`(15)/(4)` = 3
`(3)/(4)` hours = 3 hours 45 minutes