Question

Chen can ride his bike 3 miles in 15 minutes. At this rate, how long will it take Chen to ride his bike 18 miles?

Answer 1

90 minutes.

Explanation:

3 times 6 is 18, which is the amount of miles Chen is going to ride, and in order to set the other part of the problem equal to itself, you would multiply 15 times 6 to get 90 minutes.

3 x 6= 18 (miles)

15 x 6= 90 (minutes)