document.write( "Question 542430: 9 men took 20 hours to paint a house. If all the men work at the same rate, how many hours would 15 men take to complete painting the house? \n" ); document.write( "
Algebra.Com's Answer #354568 by Edwin McCravy(20056)\"\" \"About 
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9 men take 20 hours to paint a house. If all the men work at the same rate, how many hours would 15 men take to complete painting the house?
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document.write( "9 men and 15 men have a common factor of 3, so let's look at how\r\n" );
document.write( "long 3 men would take, which would be 3 times as long.  Therefore\r\n" );
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document.write( "3 men would take 60 hours to paint a house.\r\n" );
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document.write( "Therefore since 15 is 5 times as many men as 3, those 15 men would \r\n" );
document.write( "take only one-fifth as long to paint a house as only 3 men would take.\r\n" );
document.write( "One-fifth of 60 is 12.  Therefore\r\n" );
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document.write( "15 men would take 12 hours to paint a house.\r\n" );
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document.write( "Edwin
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