document.write( "Question 488920: Pipe M can fill a tank in 36 hours, and pipe N can fill it in a certain time. If both pipes are opened simultaneously, the tank gets filled in 24 hours. Find the time it takes pipe N alone to fill the tank. \n" ); document.write( "
Algebra.Com's Answer #333484 by stanbon(75887)\"\" \"About 
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Pipe M can fill a tank in 36 hours, and pipe N can fill it in a certain time. If both pipes are opened simultaneously, the tank gets filled in 24 hours. Find the time it takes pipe N alone to fill the tank.
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\n" ); document.write( "Pipe M rate: 1/36 job/hr
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\n" ); document.write( "Pipe N rate: 1/x job/hr
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\n" ); document.write( "Together rate: 1/24 job/hr
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\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/36 + 1/x = 1/24
\n" ); document.write( "24x + (24*36) = 36x
\n" ); document.write( "12x = (24*36)
\n" ); document.write( "x = 72 hrs (time for Pipe N to fill the tank alone)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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