document.write( "Question 1102559: A pilot flew his single-engine airplane 90 miles with the wind from City A to above City B. He then turned around and flew back to City A against the wind. If the wind was a constant 20 miles per hour, and the total time going and returning was 1.3 hours, find the speed of the plane in still air. \n" ); document.write( "

Algebra.Com's Answer #717261 by josgarithmetic(39617) $\"\"$ $\"About$

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document.write( "                     SPEED       TIME           DISTANCE\r\n" );
document.write( "GOING                r+20        90/(r+20)       90\r\n" );
document.write( "RETURN               r-20        90/(r-20)       90\r\n" );
document.write( "TOTAL                            1.3            180\r\n" );
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\n" ); document.write( "Solve this for r.
\n" ); document.write( " $\"90%2F%28r%2B20%29%2B90%2F%28r-20%29=1.3\"$ \n" ); document.write( "

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