Question
Pipe A can fill a tank in 15 minutes and Pipe B can fill it in 20 minutes. Both pipes are opened together for 4 minutes. After that, Pipe A is closed and Pipe C, which can empty the full tank in 30 minutes, is opened along with Pipe
Pipe A can fill a tank in 15 minutes and Pipe B can fill it in 20 minutes. Both pipes are opened together for 4 minutes. After that, Pipe A is closed and Pipe C, which can empty the full tank in 30 minutes, is opened along with Pipe
B. In how many more minutes will the tank be filled?
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