document.write( "Question 162127: A plane can fly 700 miles with the wind in 3.5 hours. the same plane travels 800 miles against the wind in 5 hours. what is the speed of the wind and the speed of the plane in still air???? \n" ); document.write( "
Algebra.Com's Answer #119482 by checkley77(12844)\"\" \"About 
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700/3.5=200 mph with the wind.
\n" ); document.write( "800/5=160 mph against the wind.
\n" ); document.write( "(200-160)/2=40/2=20 mph is the wind speed.
\n" ); document.write( "200-20=180 plane speed.
\n" ); document.write( "160+20=180 ditto.
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