document.write( "Question 183377: One pump fills a tank 4 times as fast as another pump. If the pumps work together, they fill the tank in 28 minutes. How long does it take for each pump to fill the tank?
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Algebra.Com's Answer #137680 by vleith(2983)\"\" \"About 
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Let the slow pump rate be X. Then the fast pump rate is 4X
\n" ); document.write( "Together they can pump at X+4X = 5X\r
\n" ); document.write( "\n" ); document.write( "The slow pump will be 1/5 as fast. So it will take 28*5 minutes
\n" ); document.write( "The faster pump will be 4/5 as fast. So it will take (28*5)/4 minutes
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