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) ![]() You can put this solution on YOUR website! 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( "** \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 \n" ); document.write( " |