A cistern has three pipes A,B and C. A and B can fill it in 2 hours and 3 hours respectively. C is a waste-pipe. If all three pipes are opened at a time, 7/12 of the cistern will be filled up in one hour. In what time can C alone empty the full cistern?
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A and B can fill it in 3 hours and 4 hours respectively While C can empty the completely filled cistern in 1 hour If the Pipe are opened in order at 3, 4 and 5 p.m respectively at what time will the cistern be empty ? Description for Correct answer: Pipe A is opened at 3 p.m., pipe B at 4 p.m. and the pipe C at 5 p.m.
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