document.write( "Question 1010820: Pump A and Pump B each can empty a tank in 2hrs. Another Pump C can empty the same tank using double the time of Pump A. If all 3 pumps are working together at the same time, how long will it take to empty the tank?\r
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Algebra.Com's Answer #626279 by josgarithmetic(39625)\"\" \"About 
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The rates of the different pumps are given as one unit of capacity in some amounts of time.
\n" ); document.write( "The pumps work to remove water from ONE tank.\r
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document.write( "PUMP         RATE(TANKS PER HOUR)\r\n" );
document.write( "A            1/2\r\n" );
document.write( "B            1/2\r\n" );
document.write( "C            1/4\r\n" );
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\n" ); document.write( "\n" ); document.write( "The flow rate for the three pumps working at the same time is the sum of their individual rates.\r
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\n" ); document.write( "\n" ); document.write( "Their combined rate, tanks-worth per hour, \"1%2F2%2B1%2F2%2B1%2F4=highlight%281%261%2F4%29\".
\n" ); document.write( "This means, that quantity of TANKS, done in 1 HOUR.
\n" ); document.write( "YOU want what is amount of time in order to empty ONE tank.\r
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\n" ); document.write( "\n" ); document.write( "Reciprocal of \"1%261%2F4\".
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