document.write( "Question 1205973: It takes Leon 17 hours to seal his driveway working by himself. If Michael helps Leon, they can seal the driveway in 5 hours. How long would it take Michael to seal the driveway alone? \n" ); document.write( "

Algebra.Com's Answer #843103 by ikleyn(52787) $\"\"$ $\"About$

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\n" ); document.write( "It takes Leon 17 hours to seal his driveway working by himself.
\n" ); document.write( "If Michael helps Leon, they can seal the driveway in 5 hours.
\n" ); document.write( "How long would it take Michael to seal the driveway alone?
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document.write( "Their combined rate of work is 1/5 of the job per hour.\r\n" );
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document.write( "Leon's rate of work is 1/17 of the job per hour.\r\n" );
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document.write( "Hence, Michael's rate of work is the difference\r\n" );
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document.write( "     -  =  -  =   of the job per hour.\r\n" );
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document.write( "It means that Michael needs   = 7 hours = 7 hours and 5 minutes\r\n" );
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document.write( "to complete the job working alone.\r\n" );
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document.write( "ANSWER.  Michael needs  7 hours and 5 minutes to complete the job working alone.\r\n" );
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