document.write( "Question 689374: one pipe can fill a swimming pool in 10 hours. if a second pipe is used together with the first pipe, the pool can be filled in 6 hours. how long would it take the second pipe alone to fill the pool?
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Algebra.Com's Answer #425922 by Edwin McCravy(20055) $\"\"$ $\"About$

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one pipe can fill a swimming pool in 10 hours. if a second pipe is used
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document.write( "We are given the first pipe's filling rate as 1 pool per 10 hours, or\r\n" );
document.write( " or \r\n" );
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document.write( "We let X = the number of hours it takes ths second pipe to fill the pool.\r\n" );
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document.write( "So we can say the second pipe's filling rate is 1 pool per X hours, or\r\n" );
document.write( " or .\r\n" );
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document.write( "We are given their combined filling rate as 1 pool per 6 hours, or\r\n" );
document.write( " or .\r\n" );
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document.write( "The equation comes from:\r\n" );
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document.write( "Solve that by getting an LCD of 30X\r\n" );
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document.write( "Answer:  X = 15 hours.\r\n" );
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document.write( "Edwin

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