document.write( "Question 839213: A cistern can be filled by an inlet pipe in 6 hours & emptied by an outlet pipe in 10 hours. After 3 hours the outlet pipe is closed. How much time to fill up the remaining part of the tank? \n" ); document.write( "
Algebra.Com's Answer #511425 by richwmiller(17219)\"\" \"About 
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3/6-3/10+x/6=1
\n" ); document.write( "x = 24/5 =4.8
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