SOLUTION: Sally drives to work at an average speed of 47 mph and returns along the same route at a speed of 62 moh. What is her average speed?

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Question 698124: Sally drives to work at an average speed of 47 mph and returns along the same route at a speed of 62 moh. What is her average speed?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sally drives to work at an average speed of 47 mph and returns along the same route at a speed of 62 moh. What is her average speed?
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avg = 2*47*62/(47+62)
=~ 53.47 mi/hr