document.write( "Question 792359: A tap can fill the tub in 6 minutes. At the same time a full tub can be drained in
\n" ); document.write( "9 minutes. If the tap is turned on and the drained at the same time, how long would it take to fill the empty tub to full?
\n" ); document.write( "

Algebra.Com's Answer #479988 by josgarithmetic(39620)\"\" \"About 
You can put this solution on YOUR website!
The rate of filling with both vents open at same time is \"1%2F6-1%2F9\" tubs per minute. \"%283-2%29%2F18=1%2F18\" tubs per minute. You are interested in the reciprocal, 18 minutes to fill the tub. \n" ); document.write( "
\n" );