Question 517440
If a plane can travel 460 miles per hour with the wind and 420 miles per hour against the wind, find the speed of the plane in still air.
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Down-wind DATA:
p + w = 460
p - w = 420
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Add and solve for "p":
2p = 880
plane speed = 440 mph
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Solve for "w":
p + w = 460
440 + w = 460
w = 20 mph (wind speed)
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Cheers,
Stan H.
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