document.write( "Question 973876: If george washed a car in 20 minutes and sally washed the same car in 15 minutes how long would it take them to wash the car together? \n" ); document.write( "
Algebra.Com's Answer #599980 by 428225(90)\"\" \"About 
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The working out should be:
\n" ); document.write( "\"1%2F15%2B1%2F20=1%2Ft\"
\n" ); document.write( "\"7%2F60=1%2Ft\"
\n" ); document.write( "Therefore
\n" ); document.write( "\"t=60%2F7\"
\n" ); document.write( "t=8.57 minutes
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