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Two taps can fill a tank in 48 minutes and 72 minutes respectively. A third outlet pipe can empty the tank in 1 hour. If all the three are opened simultaneously, what is the time required to fill the tank? | |
A. | 90 mins [Wrong Answer] |
B. | 49(5/12) mins [Wrong Answer] |
C. | 54 mins [Wrong Answer] |
D. | 55(5/13) mins [Correct Answer] |