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If a plane can travel 450450 miles per hour with the wind and 410410 miles per hour against the​ wind, find the speed of the wind and the speed of the plane in still air.

Answer :

sqdancefan
The plane speed in still air is the average of the two speeds: 430 miles/hour.
The wind speed is half the difference of the two speeds: 20 miles/hour.

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