document.write( "Question 1144656: A new type of pump can train a certain pool in 9 hours. an older pump can drain the pool in 11 hours. how long will it take both pumps working together to drain the pool? \n" ); document.write( "

Algebra.Com's Answer #765821 by ikleyn(52778) $\"\"$ $\"About$

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\n" ); document.write( "A new type of pump can $\"highlight%28cross%28train%29%29\"$ drain a certain pool in 9 hours. an older pump can drain the pool in 11 hours.
\n" ); document.write( "how long will it take both pumps working together to drain the pool?
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document.write( "The new pump drains    of the pool volume in our (in each hour).\r\n" );
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document.write( "The old pump drains    of the pool volume in our (in each hour).\r\n" );
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document.write( "Working together, the two pumps drain   +  =  =  of the pump volume per hour.\r\n" );
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document.write( "Hence, it will take   hours =  hours = 4 hours and 57 minutes for two pumps working together to drain the pool.\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is a standard and typical joint work problem.\r
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\n" ); document.write( "\n" ); document.write( "There is a wide variety of similar solved joint-work problems with detailed explanations in this site. See the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Using Fractions to solve word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Solving more complicated word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Selected joint-work word problems from the archive \r
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\n" ); document.write( "\n" ); document.write( "Read them and get be trained in solving joint-work problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic
\n" ); document.write( "\"Rate of work and joint work problems\" of the section \"Word problems\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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