Question 1071697
An airplane traveling against a steady wind takes 3 hours to make a 1500 mile trip. The return trip in the direction of the wind only takes 2 hours and 30 minutes. What is the speed of the plane in still weather and what is the wind speed?
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Find the 2 groundspeeds, upwind & downwind.  The plane's airspeed is the average of the 2.
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Windspeed is the difference between airspeed and groundspeed.