Question

If it took 28 minutes to run 4 miles, then at that rate, how long would it take to run 20 miles?

Answer 1

140 minutes

Explanation:

After 28 mins you've gone 4 miles, assuming this rate is constant and you dont slow down or speed up, in order to get to 20 miles you will have run 5x as much (20/4 = 5), thus 5x the amount of time (28x5).

20/4 = 5

5x28 = 140

Answer 2

140 minutes

Explanation:

28 :4 =7 minutes to run 1 mile

20 ×7 =140 minutes