document.write( "Question 23731: if it takes sally 4 hours to paint a house and it take john 6 hours to paint the same house, then how long will it take both of them at the same time? \n" ); document.write( "
Algebra.Com's Answer #12515 by Paul(988)\"\" \"About 
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Sally paints 1/4 of house in one hour
\n" ); document.write( "John paints 1/6 of house in one hour
\n" ); document.write( "1/4 + 1/6 = 3/12 + 2/12\r
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\n" ); document.write( "\n" ); document.write( "5/12 = 12/5 = 2.4
\n" ); document.write( "Hence together they paint the house in 2.4 hours.
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