Question 626063: Linda hiked up a mountain trail and camped overnight at the top. The next day she returned down the same trail. Her average rate traveling uphill was kilometers per hour and her average rate downhill was kilometers per hour. If she spent a total of hours hiking, how long was the trail?
Do not do any rounding.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Linda hiked up a mountain trail and camped overnight at the top. The next day she returned down the same trail. Her average rate traveling uphill was kilometers per hour and her average rate downhill was kilometers per hour. If she spent a total of hours hiking, how long was the trail?
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No numbers are given.
Avg spd for a round-trip is
2*r1*r2/(r1 + r2), r1 & r2 are the speeds
It's similar to parallel resistors, flow problems, etc, but times 2.
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