Sasha drove from her house to the grocery store in 20 minutes. Her return trip took 15 minutes. If the store is 7 miles from her house, what was Sasha's average speed for the round trip, in miles per hour?

Question

Mathematics

Giancarlo Mccormick

19 July, 15:24

Sasha drove from her house to the grocery store in 20 minutes. Her return trip took 15 minutes. If the store is 7 miles from her house, what was Sasha's average speed for the round trip, in miles per hour?

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Answers (2)

Know the Answer?

Kymani West · Answer 1

Total time = 35 minutes

Total distance = 14 miles

I would set this up as a proportion

14/35 = x/60 (60 minutes in an hour)

Now cross multiply and solve.

35x = 840

840/35 = 24 mph

Dalia Decker · Answer 2

Distance = rate * time

7 miles = rate * 20 minutes

7/20 = 20r/20

r = 0.35 mph