document.write( "Question 224168: Two water pipes can fill a tank with water in 6 hours. The larger pipe working alone can fill the tank in 9 hours. How long will it take the smaller pipe working alone to fill the tank? \n" ); document.write( "
Algebra.Com's Answer #167467 by stanbon(75887)\"\" \"About 
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Two water pipes can fill a tank with water in 6 hours. The larger pipe working alone can fill the tank in 9 hours. How long will it take the smaller pipe working alone to fill the tank?
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\n" ); document.write( "Together DATA:
\n" ); document.write( "time = 6 hrs/job ; rate = 1/6 job/hr
\n" ); document.write( "--------------
\n" ); document.write( "Larger pipe DATA:
\n" ); document.write( "time = 9 hrs/job ; rate = 1/9 job/hr
\n" ); document.write( "--------------
\n" ); document.write( "Smaller pipe DATA:
\n" ); document.write( "time = x hrs/job ; rate = 1/x job/hr
\n" ); document.write( "---------------
\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/x + 1/9 = 1/6
\n" ); document.write( "Multiply thru by 54x to get:
\n" ); document.write( "54 + 6x = 9x
\n" ); document.write( "3x = 54
\n" ); document.write( "x = 18 hrs (time for the smaller pipe to do the job)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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