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)![]() ![]() 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 \n" ); document.write( "check \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 \n" ); document.write( " \n" ); document.write( " |