Question

Ruth is training for a half-marathon. On Saturday, she ran 3 miles in 34.5 minutes. On Sunday, she ran 2.5 miles in 28 minutes. How much faster, in minutes per mile, was her pace on Sunday than on Saturday? I have been trying to figure this out forever

Answer 1

Ruth runs faster on Sunday, and her pace was 0.0023 miles/min faster that day.

Explanation:

We need to calculate the unit rate for each of the two days.

Saturday: (3 miles)/(34.5 min) = 0.0870 miles/min

Sunday: (2.5 miles)/(28 min) = 0.0893 miles/min

Subtracting the first result from the second yields 0.0023 miles/min. This is the desired result. Ruth runs faster on Sunday, and her pace was 0.0023 miles/min faster that day.