document.write( "Question 356284: If Jim can paint a house in 3 hr and Robert can paint the same house in 5 hr, how long does it take them to paint it together? \n" ); document.write( "
Algebra.Com's Answer #254342 by Alan3354(69443)\"\" \"About 
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If Jim can paint a house in 3 hr and Robert can paint the same house in 5 hr, how long does it take them to paint it together?
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\n" ); document.write( "Look at how much each does per hour.
\n" ); document.write( "Jim does 1/3 of the job per hour.
\n" ); document.write( "Robert does 1/5 per hour.
\n" ); document.write( "Add those for the total per hour.
\n" ); document.write( "Invert it to get hours per job.\r
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