document.write( "Question 1161979: ok so I'm completely stumped, please help? Theres too many numbers here\r
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\n" ); document.write( "\n" ); document.write( "3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?\r
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\n" ); document.write( "\n" ); document.write( "a) 8
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\n" ); document.write( "e) 12 \n" ); document.write( "

Algebra.Com's Answer #785645 by math_helper(2461) $\"\"$ $\"About$

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document.write( "Amount of time to empty the tank using 3 pumps: 16 hrs
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document.write( "The three pumps together pump out  1/16 of a tank per hour\r
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document.write( "Each pump does 1/3 of the work, therefore one pump empties 
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document.write( "(1/3)*(1/16) = 1/48 of a tank per hour\r
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document.write( "We see now that one pump can empty the tank in 48 hours, so 
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document.write( "4 pumps can empty it in (48/4) or 12 hours.
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