document.write( "Question 515020: A plane travels from Orlando to Denver and back again. On the five-hour trip from Orlando to Denver, the plane has a tailwind of 40 miles per hour. On the return trip from Denver to Orlando, the plane faces a headwind of 40 miles per hour. This trip takes six hours. What is the speed of the airplane in still air?
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Algebra.Com's Answer #343709 by ankor@dixie-net.com(22740)\"\" \"About 
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A plane travels from Orlando to Denver and back again.
\n" ); document.write( "On the five-hour trip from Orlando to Denver, the plane has a tailwind of 40 miles per hour.
\n" ); document.write( " On the return trip from Denver to Orlando, the plane faces a headwind of 40 miles per hour. This trip takes six hours.
\n" ); document.write( " What is the speed of the airplane in still air?
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\n" ); document.write( "Let s = speed of plane in still air
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\n" ); document.write( "Write a distance equation, dist = speed * time
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\n" ); document.write( "Dist to Olan = Dist to Den
\n" ); document.write( "6(s-40) = 5(s+40)
\n" ); document.write( "6s - 240 = 5s + 200
\n" ); document.write( "6s - 5s = 200 + 240
\n" ); document.write( "s = 440 mph is the plane speed in still air
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\n" ); document.write( "Confirm this by finding the distance each way, should be equal if we did it right
\n" ); document.write( "6(440-40) = 2400 mi
\n" ); document.write( "5(440+40) = 2400 mi
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