document.write( "Question 491846: James can mop a warehouse in 12 hours. One day his friend Molly helped him and it only took 4.8 hours. How long would it take Molly to do it alone? \n" ); document.write( "
Algebra.Com's Answer #334861 by lwsshak3(11628)\"\" \"About 
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James can mop a warehouse in 12 hours. One day his friend Molly helped him and it only took 4.8 hours. How long would it take Molly to do it alone?
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\n" ); document.write( "let 1/12= james' work rate
\n" ); document.write( "let 1/x= molly's work rate
\n" ); document.write( "1/4.8= work rate when James and Molly work together
\n" ); document.write( "..
\n" ); document.write( "Individual work rates=work rate when working together
\n" ); document.write( "1/12+1/x=1/4.8
\n" ); document.write( "4.8/12+4.8/x=1
\n" ); document.write( ".4+4.8/x=1
\n" ); document.write( "4.8/x=1-.4=.6
\n" ); document.write( "x=4.8/.6=8
\n" ); document.write( "Ans:
\n" ); document.write( "It would take Molly 8 hours to finish the job alone
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