<PRE><B>Question 90372</B>
It took the pilot a hour and a half to make a flight of 240 miles when flying against the wind. If the return trip took an hour and 12 minutes, what was the speed of the wind?
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Against the wind DATA:
Time = 1.5 hrs ; distance = 240 miles; rate = d/t = 240/1.5 = 160 mph
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With the wind DATA:
Time = 1.2 hrs ; distance = 240; rate = d/t = 240/1.2 = 200 mph
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Let speed of plane in calm air be p; Let speed of wind be w.
EQUATIONS:
p+w = 200
p-w = 160
Adding you get 2p=360
p = 180 (speed of plane in still air)
180 + w = 200
w = 20 (speed of the wind)
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Cheers,
Stan H.
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