document.write( "Question 295940: Ting can mow a lawn in 4 hours. Her boss, Renald, can mow the lawn in 3 hours. How long will il take them to mow the lawn if they work together? \n" ); document.write( "
Algebra.Com's Answer #213303 by nerdybill(7384)\"\" \"About 
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Ting can mow a lawn in 4 hours. Her boss, Renald, can mow the lawn in 3 hours. How long will il take them to mow the lawn if they work together?
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\n" ); document.write( "Ting rate: 1 lawn per 4 hours
\n" ); document.write( "Renald rate: 1 lawn per 3 hours
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\n" ); document.write( "then
\n" ); document.write( "Let t = hours it takes for both
\n" ); document.write( "t(1/4 + 1/3) = 1
\n" ); document.write( "multiplying both sides 12:
\n" ); document.write( "t(3 + 4) = 12
\n" ); document.write( "t(7) = 12
\n" ); document.write( "t = 12/7
\n" ); document.write( "t = 1.71 hours
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