document.write( "Question 232515: If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together? \n" ); document.write( "
Algebra.Com's Answer #171805 by Alan3354(69443)\"\" \"About 
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If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
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\n" ); document.write( "S paints 1/4 house per hour.
\n" ); document.write( "J paints 1/6 per hour.
\n" ); document.write( "Together, they paint 1/4 + 1/6 per hour = 5/12 per hour.
\n" ); document.write( "--> 12/5 hours/house
\n" ); document.write( "= 2.4 hours
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