Two pipes A and B can fill a tank in 20 and 24 minutes. Resepctively. Pipe C can empty the tank in 10 minutes. Pipes A and B are opened for 5 minutes and then pipe C is also opend. In what time can tank become full or empty after opening pipe C?

Two pipes A and B can fill a tank in 25 min and 45 min respectively. Pipe C can empty. The tank in 10 minutes. If pipe A and pipe B are kept open for 5 minutes in The begining and then C is also opened. In what time will the tank be emptied?

Pipes A and B can fill a tank in 18 minutes and 22 1/2 minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ..........

Two pipes A and B can fill a tank in 12 and 15 minutes respectively. A third pipe C can empty it in 10 minutes. How long will it take to fill in the tank if all pipes are opened simultaneously ?

Two pipes A and B can fill a tank in 100 minutes and 120 minutes respectively. Pipe C can alone empty the same tank in 200 minutes. If all three pipes are opened together, then in how many minutes will the tank be filled?

Two pipes A and B can fill a tank in 12 minutes and 15 minutes respectively while a third pipe C can empty the full thank in 20 minutes.All the three pipes are opened in the beginning. However,pipe C is closed 6 minutes before the tank is filled.In what time will the tank be full?