Question 919028
An airplane travels 1800 miles in 2.5 hours with the aid of a tail wind. It takes 3 hours for the return trip, flying against the same wind. Find the speed of the airplane in the still wind, and the speed of the wind. 
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Find the 2 groundspeeds.  The plane's airspeed is the average of the 2.
The windspeed = difference between groundspeed and airspeed.