document.write( "Question 395193: a pool can be filled water using pipe a in 4hrs drained using pipe b in 10 hours. if pipe b is accidentally left open while the pool is being filled how, long will it take to fill the pool
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Algebra.Com's Answer #280487 by mananth(16946)\"\" \"About 
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a pool can be filled water using pipe a in 4hrs drained using pipe b in 10 hours. if pipe b is accidentally left open while the pool is being filled how, long will it take to fill the pool\r
\n" ); document.write( "\n" ); document.write( "pipe A ----- 4 hours
\n" ); document.write( "so it does 1/4 of job in 1 hour,
\n" ); document.write( "Pipe B ----------- 10 hours
\n" ); document.write( "so it does 1/10 of the job in 1 hour.
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\n" ); document.write( "1/4 -1/10 is the job done in 1 hour when both are open
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\n" ); document.write( "(10-4)/40= 6/40 = 3/20 of the job
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\n" ); document.write( "so it will take 20/3 hours to fill the pool.
\n" ); document.write( "=6.66 hours
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