Question 719845
An airplane takes 6 hours to travel a distance of 5040 km against the wind. The return trip takes 5 hours with the wind. What is the rate of the plane in still air and what is the rate of the wind? 
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Find the 2 groundspeeds.
The plane's airspeed is the average of the 2 groundspeeds.
The windspeed is the difference between airspeed and groundspeed.