SOLUTION: a water tank has an inlet and on outlet the inlet is capable of filling the tank in 20 minutes and the outlet is caable of empty the tank in 40 minutes when the inlet was opened to

Algebra ->  Rate-of-work-word-problems -> SOLUTION: a water tank has an inlet and on outlet the inlet is capable of filling the tank in 20 minutes and the outlet is caable of empty the tank in 40 minutes when the inlet was opened to      Log On


   

Question 1070684: a water tank has an inlet and on outlet the inlet is capable of filling the tank in 20 minutes and the outlet is caable of empty the tank in 40 minutes when the inlet was opened to till the empty tank
Answer by josgarithmetic(39614) About Me  (Show Source):
You can put this solution on YOUR website!
Inlet pipe can fill 1 tank in 20 minutes.
Outlet pipe can empty 1 tank in 40 minutes.

What is the actual question? Can you write the problem description and question properly?

Rate for the inlet pipe is 1%2F20.
Rate for the outlet pipe is -1%2F40.
The COMBINED rate of the two pipes together is 1%2F20-1%2F40=2%2F40-1%2F40=1%2F40, which means that if both pipes are open, and if volume starts as 1 EMPTY tank, the tank would be filled in 40 minutes.