document.write( "Question 783272: One pipe can fill a pool in 9 hours and another pipe can fill the same pool in 12 hours. To fill up the pool, only the first pipe was turned on. After three hours it broke down, and the second pipe was automatically turned on.
\n" ); document.write( "a) How many hours did it take to fill up the pool?
\n" ); document.write( "b) Hom many hours would it take to fill up the pool if the two pipes started to work together?
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Algebra.Com's Answer #476656 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "One pipe can fill a pool in 9 hours and another pipe can fill the same pool in 12 hours. To fill up the pool, only the first pipe was turned on. After three hours it broke down, and the second pipe was automatically turned on.
\n" ); document.write( "a) How many hours did it take to fill up the pool?
\n" ); document.write( "b) Hom many hours would it take to fill up the pool if the two pipes started to work together?\r
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\n" ); document.write( "\n" ); document.write( "a) It takes pipe one 3 hours to fill \"1%2F3\" of pool\r
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\n" ); document.write( "\n" ); document.write( "It takes pipe two 8 hours to fill remaining \"2%2F3\" of pool\r
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\n" ); document.write( "\n" ); document.write( "It takes 3 + 8, or \"highlight_green%2811%29\" hours to fill pool\r
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\n" ); document.write( "\n" ); document.write( "b) With both turned on, it'll take \"36%2F7\", or \"highlight_green%285%261%2F7%29\" hours to fill pool.\r
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\n" ); document.write( "\n" ); document.write( "You can do the check!! \r
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\n" ); document.write( "\n" ); document.write( "Further help is available, online or in-person, for a fee, obviously. Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com
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