document.write( "Question 635160: Sheila can map their floor in 30 min and her sister Bunny in 45 min.How long it take them to finish the job if they work together? \n" ); document.write( "
Algebra.Com's Answer #400182 by checkley79(3341)\"\" \"About 
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1/45+1/30=1/x
\n" ); document.write( "(30+45)/45*30=1/x
\n" ); document.write( "75/1350=1/x
\n" ); document.write( "75x=1350
\n" ); document.write( "x=1350/75
\n" ); document.write( "x=18 min. when working together.\r
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