document.write( "Question 450204: if one painter can paint a house in 5 days and another painter can paint the same house in 4 days, how long will it take them to paint the house together? \n" ); document.write( "
Algebra.Com's Answer #309713 by edjones(8007)\"\" \"About 
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The 1st can do 1/5 the job in a day and the 2nd 1/4 the job in a day.
\n" ); document.write( "Together:
\n" ); document.write( "1/5 + 1/4 = 1/t
\n" ); document.write( "4/20 + 5/20 = 1/t
\n" ); document.write( "9/20=1/t
\n" ); document.write( "t=20/9 hrs.
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