Question 1188498
An airplane travels 870 miles in 3 hours with the wind.  That same plane traveled 690 miles against the wind.  How fast was the plane flying and how fast was the wind?
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Assuming the 690 miles also took 3 hours:
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Find the 2 groundspeeds, downwind and upwind.  The plane's airspeed is the average of the 2.
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Windspeed is the difference between groundspeed and airspeed.