SOLUTION: a plane traveled to Des Moines and back. The trip there was with the wind. It took 4 hours. the trip back was into the wind. the trip back took 8 hours. find the speed of the plane

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Question 481550: a plane traveled to Des Moines and back. The trip there was with the wind. It took 4 hours. the trip back was into the wind. the trip back took 8 hours. find the speed of the plane in still air and the speed of the wind.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
d = the distance
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The plane's airspeed is the average of the 2 groundspeeds.
The wind speed is the difference between the airspeed and the groundspeed.
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To get a number, the distance has to be known.