document.write( "Question 601577: Justin can mow a lawn in 2 hours. David can mow a lawn in 3 hours. How long will it take them to mow one lawn together? \n" ); document.write( "

Algebra.Com's Answer #379867 by nerdybill(7384) $\"\"$ $\"About$

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Justin can mow a lawn in 2 hours. David can mow a lawn in 3 hours. How long will it take them to mow one lawn together?
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\n" ); document.write( "Let x = time (hours) for both
\n" ); document.write( "then
\n" ); document.write( "x(1/2 + 1/3) = 1
\n" ); document.write( "multiplying both sides by 6:
\n" ); document.write( "x(3 + 2) = 6
\n" ); document.write( "x(5) = 6
\n" ); document.write( "x = 6/5
\n" ); document.write( "x = 1.2 hours
\n" ); document.write( "or
\n" ); document.write( "x = 1 hour and 12 minutes
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