SOLUTION: If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind, find the speed of the plane in still air?

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Question 384344: If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind, find the speed of the plane in still air?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If a plane can travel 480 miles per hour with the wind and 400 miles per hour against the wind, find the speed of the plane in still air?
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Let "p" be speed of plane in still air.
Let "c" be speed of the wind.
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Equations:
p + c = 480 mph
p - c = 400 mph
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Add and solve for "p":
2P = 880
p = 440 mph (speed of the plane in still air)
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Cheers,
Stan H.