Pipes A and B can empty a full tank in 5 hours and 12 hours respectively. Pipe C can fill the same empty tank in 2 hours. If all the three pipes are opened together, then the tank will be filled in:
A50/13 hrs
B65/12 hrs
C60/13 hrs
D55/12 hrs
A50/13 hrs
B65/12 hrs
C60/13 hrs
D55/12 hrs
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