SOLUTION: A tap can fill the tub in 6 minutes. At the same time a full tub can be drained in 9 minutes. If the tap is turned on and the drained at the same time, how long would it take to

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A tap can fill the tub in 6 minutes. At the same time a full tub can be drained in 9 minutes. If the tap is turned on and the drained at the same time, how long would it take to       Log On


   



Question 792359: A tap can fill the tub in 6 minutes. At the same time a full tub can be drained in
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?

Answer by josgarithmetic(39618) About Me  (Show Source):
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.