GAT Subject
Engineering
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51. | Two pipes A and B can separately fill a tank in 2 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank? | |
A. | 9 min | |
B. | 10 min | |
C. | 11 min | |
D. | 12 min | |