Question 1049767
Flying against the wind, an airplane travels 
2010km in 3 hours. Flying with the wind, the same plane travels 5450km in 5
hours. 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, upwind and downwind.
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The plane's airspeed is the average of the 2.
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The windspeed is the difference between airspeed and groundspeed.