Question

John waters his 2 1/2 acres of farmland in 1/3 of an hour. What is his speed in acres per hour?

Answer 1

7.5 acres per hour

Explanation:

1) You know that in 1/3 of an hour John waters 2 1/2, or 2.5, acres of farmland.

2) To get 1 hour we would multiply what John waters in 1/3 of an hour by 3.

2.5acres * 3 = 7.5 acres per hour

3) We multiply by 3 because 1/3 of an hour * 3 = 1 hour

so: 2.5acres * 3 = 7.5 acres per hour