Asked by Matthew
A cyclist covers his outward journey downhill at 24mph. His return journey, over exactly the same distance uphill, is covered at only 12mph. What is the cyclist's average speed over the entire journey?
Answers
Answered by
Steve
If the distance each way is x, then since speed = distance/time,
2x/(x/24 + x/12) = 2x/(3x/24) = 16
2x/(x/24 + x/12) = 2x/(3x/24) = 16
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