document.write( "Question 141034: One pipe fills a pool in 6 hours . A second pipe can fill the same pool in 4 hours, how long would it take to fill the pool if both pipes were working? \n" ); document.write( "
Algebra.Com's Answer #102678 by stanbon(75887)\"\" \"About 
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One pipe fills a pool in 6 hours . A second pipe can fill the same pool in 4 hours, how long would it take to fill the pool if both pipes were working?
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\n" ); document.write( "1st pipe DATA:
\n" ); document.write( "Time = 6 hrs/job ; Rate = 1/6 job/hr.
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\n" ); document.write( "2nd pipe DATA:
\n" ); document.write( "Time = 4 hrs/job ; Rate = 1/4 job/hr.
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\n" ); document.write( "Together DATA
\n" ); document.write( "Time = x hrs/job ; Rate = 1/x job/hr
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\n" ); document.write( "EQUATION:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/6 + 1/4 = 1/x
\n" ); document.write( "2x + 3x = 12
\n" ); document.write( "5x = 12
\n" ); document.write( "x = 2.4 hrs (time to fill the pool using both pipes)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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