SOLUTION: An airplane flies 490 miles with the wind and 330 against the wind in the same length of time. If the speed of the wind is 20, what is the speed of the airplane in still air?
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Question 682200: An airplane flies 490 miles with the wind and 330 against the wind in the same length of time. If the speed of the wind is 20, what is the speed of the airplane in still air? Answer by lynnlo(4176) (Show Source):
You can put this solution on YOUR website! plane speed in still air is r=102.5mph
PROOF
490/(102.5+20)=330/(102.5-20)
490/122.5=330/82.5
4=4
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