Pipe X, Y and Z can fill a tank in 10 minutes, 5 minutes and 10 minutes respectively. Find the time taken by the tank to be filled, if all the pipes are opened simultaneously.

Pipes A, B, and C can fill a tank individually in 5 min, 10 min, and 15 min respectively. Find the time taken to fill the tank when all three Pipes are opened simultaneously.

Three pipes can fill a tank in 6, 10, 15 hours respectively. If they are opened together, how long does it take to fill the tank?

Pipe X can fill the tank in 20 minutes while Pipe Y can empty it in 60 minutes. In how much time will the tank get filled when both the pipes are opened simultaneously?  Ops:   A. 40 minutes    B. 80 minutes    C. 75 minutes    D. 30 minutes

Three filling pipes, R, S and T, together, can fill an empty tank in two hours. S can fill the tank four times as fast as T. Initially, R alone is opened and after exactly x hours, it is closed and immediately S and T are opened together. The tank is full after exactly another y hours. If the tank was filled in a total of 4 hours, and x ≠ y, find the time (in hours) that T alone would take to fill the tank.6201224

A pipe can fill a tank in 3 hours. There are two outlet pipes from the tank which can empty it in 7 and 10 hours respectively. If all the three pipes are opened simultaneously, then the tank will be filled in Question Description : 8 hours10 hours 11 hours9 hours