document.write( "Question 120361: Two men, A and B, can paint a house in 8 days. A alone can paint it in 12 days. How long will B take to paint the house by himself. \r
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document.write( "I am unsure on how to solve this. All I know is that there is some formula to this that involves many proportions. Please help! \n" );
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Algebra.Com's Answer #88260 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! yes, there is \"some formula\", but if you look at the problem and understand what's going on, its pretty easy\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when multiple people work together on a task, each one does some fraction \n" ); document.write( "__ that fraction is based on how fast a person can do the job alone \n" ); document.write( "__ fraction of task=(time together)/(time alone)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "think about it __ if Joe can do a job in 3 hrs, and he works in a group that takes 1 hr, Joe does 1/3 of the job\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "in 8 days, A does 8/12 or 2/3 of the job \n" ); document.write( "__ this means it takes B 8 days to do 1/3 of the job\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so how many days for B to do 3/3 (the whole thing)? \n" ); document.write( " |