document.write( "Question 1119314: Flying against the wind, an airplane travels 8100 km in 9 hours. Flying with the wind, the same plane travels 4960 km in 4 hrs. What is the rate of the plane in still air and what is the rate of the wind? \r
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Algebra.Com's Answer #734790 by Alan3354(69443)\"\" \"About 
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Find the 2 groundspeeds, downwind and upwind.
\n" ); document.write( "The plane's airspeed is the average of the 2.
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\n" ); document.write( "Windspeed = difference between airspeed and groundspeed.
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