document.write( "Question 641053: 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 together? Hi I know the answer , but I dont know how to do it. Please elaborate. Thanks, Nelida. \n" ); document.write( "
Algebra.Com's Answer #403581 by lwsshak3(11628)\"\" \"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 together? Hi I know the answer , but I dont know how to do it. Please elaborate.
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\n" ); document.write( "Sally can alone paint a house in 4 hrs,
\n" ); document.write( "her work rate=1/4 house per hr
\n" ); document.write( "..
\n" ); document.write( "John can alone paint a house in 6 hrs,
\n" ); document.write( "his work rate=1/6 house per hr
\n" ); document.write( "..
\n" ); document.write( "Working together Sally and John can paint the house in x hours
\n" ); document.write( "Their work rate working together=1/x
\n" ); document.write( "..
\n" ); document.write( "sum of individual work rates=work rate working together
\n" ); document.write( "1/4+1/6=1/x
\n" ); document.write( "3/12+2/12=1/x
\n" ); document.write( "5/12=1/x
\n" ); document.write( "x=12/5=2.4
\n" ); document.write( "Working together Sally and John can paint the house in 2.4 hours\r
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