SOLUTION: A plane averaged 500 mph on a trip heading north but only 350 mph on the return trip. the total flight time for the round trip was 8.5 hours. what is the distance of a one-way trip

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Question 526960: A plane averaged 500 mph on a trip heading north but only 350 mph on the return trip. the total flight time for the round trip was 8.5 hours. what is the distance of a one-way trip?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
avg speed = 2*500*350/(500+350) = 35000/85 = 7000/17 mi/hr for the round trip
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d = r*t = (7000/17)*8.5 = 3500 miles round trip
one-way = 1750 miles