Question

A student mows lawns on the weekends. It takes him 140 minutes to mow 4 lawns. What prediction can you make about the time he will spend this weekend if he has 12 lawns to mow?

It will take him 12 hours to mow 12 lawns.
It will take him 10 hours to mow 12 lawns.
It will take him 7 hours to mow 12 lawns.
It will take him 3 hours to mow 12 lawns.

Answer 1

C. It will take him 7 hours to mow 12 lawns

Explanation:

140 mins = 4 lawns

12 lawns = 4 x 3

140 x 3 = 420 minutes (12 lawns)

420 ÷ 60 = 7 hours