SOLUTION: You run a trail at 7 mph and walk back at 3 mph. If your total time is 1.5 hours, your round-trip distance is how many miles?

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Question 732365: You run a trail at 7 mph and walk back at 3 mph. If your total time is 1.5 hours, your round-trip distance is how many miles?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
You run a trail at 7 mph and walk back at 3 mph. If your total time is 1.5 hours, your round-trip distance is how many miles?
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Avg speed for the round trip = 2*7*3/(7+3) = 4.2 mi/hr
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d = r*t = 4.2*1.5 = 6.3 miles RT