1.Two pipes, A and B, can fill a tank individually in 10 minutes and 15 minutes, respectively. Both pipes are opened simultaneously, but the tank does not fill as expected because a waste pipe is also open. After noticing this, the person closes the waste pipe, and the tank fills completely in 4 more minutes. How long does the waste pipe take to empty the full tank?
2.A tank has a leak at the bottom that can drain the entire tank in 6 hours. An inlet pipe supplies water at a rate of 4 liters per minute. When the tank is full, the inlet is opened, but due to the leak, the tank takes 8 hours to empty. What is the total capacity of the tank?
3.Pipes A and B can fill a tank individually in 12 minutes and 15 minutes, respectively. A third pipe, C, drains water at a rate of 45 liters per minute. When all three pipes are open simultaneously, the tank fills in 15 minutes. What is the total capacity of the tank?
4.A tank is usually filled in 8 hours, but due to a leak at the bottom, it takes 2 hours longer to fill. How long will the leak take to empty the full tank on its own?
5.Two pipes, A and B, can fill a tank in 12 minutes and 15 minutes respectively. Both pipes are opened simultaneously, but pipe A is closed after 3 minutes. How much additional time will pipe B require to fill the tank completely?
6.Two pipes, A and B, can fill a tank individually in 4 hours and 5 hours respectively. If they are operated alternately for one hour each, how long will it take to fill the tank completely?
7.A tap can fill a tank in 3.5 hours. However, due to a leak at the bottom, it takes an additional 30 minutes to fill the tank completely. How long will the leak take to empty the full tank on its own?
8.Two taps can fill a tank individually in 10 minutes and 15 minutes respectively. When a waste pipe is also open, the tank fills completely in 18 minutes. How long does the waste pipe take to empty the full tank on its own?
9.A tank has a leak that can drain it completely in 20 minutes. When a tap supplying water at 4 liters per minute is opened, the tank takes 24 minutes to empty. What is the total capacity of the tank in liters?
10.Two pipes, P and Q, can fill a tank in 12 minutes and 15 minutes respectively. Both pipes are opened simultaneously, but after 3 minutes, pipe P is closed. How much additional time will pipe Q need to fill the tank completely?
11.Two pipes, A and B, can fill a tank individually in 2 minutes and 15 minutes respectively. If both pipes are opened simultaneously but pipe A is closed after 4 minutes, how long will it take to completely fill the tank?
12.Pipes A and B can fill a tank in 20 minutes and 30 minutes respectively, while pipe C can drain the tank in 40 minutes. If all three pipes are opened simultaneously, how long will it take to fill the tank?