document.write( "Question 330798: An airplane flew 3 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2 hours. Find the speed of the plane in still air.
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Algebra.Com's Answer #237180 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Rate*Time=Distance
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\n" ); document.write( "Let P be the plane speed.
\n" ); document.write( " $\"%28P-40%293=D\"$ <--- Head wind
\n" ); document.write( " $\"%28P%2B40%292=D\"$ <--- Tail wind
\n" ); document.write( "Since they both equal $\"D\"$ , set them equal to each other.
\n" ); document.write( " $\"3P-120=2P%2B80\"$
\n" ); document.write( " $\"P=200\"$ mph \n" ); document.write( "

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