SOLUTION: A cyclist bikes x distance at 10 mile per hour and returns over the same path at 8 miles per hour. Whe is the cyclist's average rate for the round trip?

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Question 481245: A cyclist bikes x distance at 10 mile per hour and returns over the same path at 8 miles per hour. Whe is the cyclist's average rate for the round trip?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
It's similar to parallel resistors, or parallel flows, but times 2.
Avg = 2*product/sum
= 2*8*10/18
= 80/9 mi/hr