document.write( "Question 379547: An airplane can fly 650 miles with the wind in the same amount of time as it can fly 475 miles against the wind. If the wind speed is 40mph, find the speed of the plane in still air. \n" ); document.write( "
Algebra.Com's Answer #269470 by mananth(16946)\"\" \"About 
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An airplane can fly 650 miles with the wind in the same amount of time as it can fly 475 miles against the wind. If the wind speed is 40mph, find the speed of the plane in still air.
\n" ); document.write( "...
\n" ); document.write( "wind speed = 40 mph
\n" ); document.write( "let plane speed = xmph
\n" ); document.write( "..
\n" ); document.write( "against wind speed = x-40
\n" ); document.write( "with wind speed = x+40
\n" ); document.write( "..
\n" ); document.write( "time with wind = time against wind
\n" ); document.write( "t=d/r
\n" ); document.write( "650/(x+40)=475/(x-40)
\n" ); document.write( "cross multiply
\n" ); document.write( "650(x-40)=475(x+40)
\n" ); document.write( "650x-26000=475x+19000
\n" ); document.write( "650x-475x=26000+19000
\n" ); document.write( "175x=45000
\n" ); document.write( "/175
\n" ); document.write( "x= 45000/175
\n" ); document.write( "257 mph the speed of plane
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( "
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