document.write( "Question 50228: With a power mower, Phil can cut a large lawn in 3 hours. His younger brother can cut the same lawn in 6 hours. If they both work together using two power mowers, how long would it take them to cut the lawn? \n" ); document.write( "
Algebra.Com's Answer #33366 by stanbon(75887)\"\" \"About 
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Phil can cut a large lawn in 3 hours. His younger brother can cut the same lawn in 6 hours. If they both work together using two power mowers, how long would it take them to cut the lawn?
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\n" ); document.write( "Phil DATA:
\n" ); document.write( "time = 3 hr/job ; rate= 1/3 job/hr\r
\n" ); document.write( "\n" ); document.write( "Brother DATA:
\n" ); document.write( "time = 6 hr/job ; rate = 1/6 job/hr\r
\n" ); document.write( "\n" ); document.write( "Together DATA:
\n" ); document.write( "time = x hr/job ; rate = 1/x job/ hr.\r
\n" ); document.write( "\n" ); document.write( "EQUATION:
\n" ); document.write( "Phil rate + Brother rate = rate together
\n" ); document.write( "1/3 + 1/6 = 1/x
\n" ); document.write( "Multiply thru by 6x to get:
\n" ); document.write( "2x + 3x = 6
\n" ); document.write( "5x = 6
\n" ); document.write( " x= 6/5 hours to do the job together
\n" ); document.write( "6/5 hrs = 72 minutes or 1 hr 12 minutes.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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