Question 974181
 A plane traveled 1320 miles to Austin and back. The trip there was with the wind. It took 11 hours.
The trip back was into the wind. The trip back took 22 hours. Find the speed of the plane in still air and
the speed of the wind.
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Find the 2 groundspeeds, upwind and downwind.
The plane's airspeed is the average of the 2.
The windspeed is the difference between airspeed & groundspeed.