document.write( "Question 890656: A plane flies 600 miles with a tail wind in 2 hours. It takes the same plane 4 hours to fly the 600 miles when flying against the wind. What is the planes speed in still air?
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Algebra.Com's Answer #539117 by lwsshak3(11628) $\"\"$ $\"About$

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A plane flies 600 miles with a tail wind in 2 hours. It takes the same plane 4 hours to fly the 600 miles when flying against the wind. What is the planes speed in still air?
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\n" ); document.write( "let x=plane speed in still air
\n" ); document.write( "let c=wind speed
\n" ); document.write( "(x+c)=plane speed with wind
\n" ); document.write( "(x-c)=plane speed against wind
\n" ); document.write( "distance/speed=travel time
\n" ); document.write( "..
\n" ); document.write( " $\"600%2F%28x%2Bc%29=2\"$
\n" ); document.write( " $\"600%2F%28x-c%29=4\"$
\n" ); document.write( "..
\n" ); document.write( "2x+2c=600
\n" ); document.write( "4x-4c=600
\n" ); document.write( "..
\n" ); document.write( "4x+4c=1200
\n" ); document.write( "4x-4c=600
\n" ); document.write( "add
\n" ); document.write( "8x=1800
\n" ); document.write( "x=225
\n" ); document.write( "plane speed in still air=225 mph \n" ); document.write( "

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