document.write( "Question 965476: It takes 35 minutes for 10 people to paint 7 walls.\r
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document.write( "How many minutes does it take 6 people to paint 6 walls? \n" );
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Algebra.Com's Answer #590151 by Theo(13342)![]() ![]() You can put this solution on YOUR website! r*p*t = q is the general formula that's used for this type of problem.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "r = rate of one person \n" ); document.write( "p = number of people \n" ); document.write( "t = time \n" ); document.write( "q = quantity\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "in your problem, you have:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "p = 10 \n" ); document.write( "t = 35 minutes \n" ); document.write( "q = 7 walls\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "r*p*t = q becomes r*10*35 = 7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for r to get r = 7/(10*35) = 7/350.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this means that each person can paint 7/350 of a wall in 1 minute.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "now you have 6 people painting 6 walls and you want to know how long that will take if each person works at the same rate as before.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "r*p*t = q becomes 7/350 * 6 * t = 6\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for t to get t = 6 / (7/350 * 6) which becomes 6 * 350 / 7 / 6 which becomes 350 / 7 which becomes 50.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "it will take 6 people 50 minutes to paint 6 walls if each person can paint an average of 7/350 of a wall in 1 minute.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "r*p*t = q becomes 7/350 * 6 * 50 = 6 \n" ); document.write( "simplify to get 6 = 6. \n" ); document.write( "this confirms that 50 minutes is the correct solution.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |