SOLUTION: A water tank can be filled by an inlet pipe in 6 hours. It takes 4 times as long for the outlet pipe to empty the tank. How long will it take to fill the tank if both pipes are ope

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A water tank can be filled by an inlet pipe in 6 hours. It takes 4 times as long for the outlet pipe to empty the tank. How long will it take to fill the tank if both pipes are ope      Log On


   

Question 900180: A water tank can be filled by an inlet pipe in 6 hours. It takes 4 times as long for the outlet pipe to empty the tank. How long will it take to fill the tank if both pipes are open?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
The description means that the fill rate for inlet pipe is 1/6 tanks per hour and the FILL rate for the OUTLET pipe is -1%2F%284%2A6%29 tanks per hour.

If both pipes are open at the same time, then the filling rate is:
highlight%281%2F6%2B%28-1%2F24%29%29----tanks per hour--------Do the arithmetic.