SOLUTION: Sara travels up a hill at 20 mph. and back down at 160 mph. what is the average speed for the entire trip?

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Question 610774: Sara travels up a hill at 20 mph. and back down at 160 mph. what is the average speed for the entire trip?
Answer by Alan3354(69443) About Me  (Show Source):
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Sara travels up a hill at 20 mph. and back down at 160 mph. what is the average speed for the entire trip?
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Avg = 2*20*160/(20 + 160) = 6400/180
Avg = 320/9 mi/hr
Ave = 35.777... mi/hr