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Question

Pipes A and B can fill a tank in 8 hours and 24 hours respectively, while pipe C can empty the full tank in 12 hours. If all three pipes are opened together at 7:30
a.m., then at what time will 75% of the tank be filled?

A 11:48 pm

B 9:18 pm

C 3:32 pm

D 4:30 pm

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