document.write( "Question 923184: A large pump can drain a swimming pool in 3 hours. It takes 12 hours to drain the pool using a smaller pump. How long will it take to drain the pool if both pumps are used at the same time?\r
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Algebra.Com's Answer #559914 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
1/a+1/b=1/x
\n" ); document.write( "1/3+1/12=1/x
\n" ); document.write( "12/36+3/36=1/x
\n" ); document.write( "15/36=1/x
\n" ); document.write( "x=36/15
\n" ); document.write( "x=2.4 hours working together
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\n" ); document.write( "x/a+x/b=1
\n" ); document.write( "x/3+x/12=1
\n" ); document.write( "2.4/3+2.4/12=1
\n" ); document.write( "0.8+0.2=1
\n" ); document.write( "1.0=1
\n" ); document.write( "ok
\n" ); document.write( "codewt
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