SOLUTION: Big plane. A six-passenger plane cruises at 180 mph in calm air. If the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what
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Question 285956: Big plane. A six-passenger plane cruises at 180 mph in calm air. If the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what is the wind speed?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
(180+w)*t=7
(180-w)*t=5
t=7/(180+w)
t=5/(180-w)
7/(180+w)=5/(180-w)
w=30
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