SOLUTION: Jane runs up a 3-mile hill at 3mph and down the hill at 6mph. What is her average speed?

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Question 835410: Jane runs up a 3-mile hill at 3mph and down the hill at 6mph. What is her average speed?
Answer by Alan3354(69443) About Me  (Show Source):
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Jane runs up a 3-mile hill at 3mph and down the hill at 6mph. What is her average speed?
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avg speed = 2*3*6/(3+6) = 36/9
= 4 mi/hr