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Q 2244480353.     Taps A and B can fill a tank in 6 h and 4 h respectively.
Another Pipe C can empty the tank in 3 h. If all the pipes are
turned on simultaneously in what time will the tank be
IBPS-CLERK 2017 Mock Prelims
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)