document.write( "Question 1112308: A plane flies 720 miles with the wind in 3 hours. the return trip (against the wind) takes 4 hours. what is the speed of the wind and the speed of the plane in still air \n" ); document.write( "

Algebra.Com's Answer #727325 by josgarithmetic(39617) $\"\"$ $\"About$

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r, plane
\n" ); document.write( "w, wind\r
\n" ); document.write( "\n" ); document.write( " $\"system%28r%2Bw=240%2Cr-w=180%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"2r=240%2B180\"$
\n" ); document.write( " $\"r=120%2B90\"$
\n" ); document.write( " $\"r=210\"$ ------plane\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"2w=60\"$
\n" ); document.write( " $\"w=30\"$ ------wind \n" ); document.write( "

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