Mathematics · Time and Work
Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and C is an emptying pipe, which alone can empty a full tank in x hours. All three pipes were opened together at 9:30 a.m., but C was closed at 12:30 p.m. If the tank gets filled at 7:30 p.m. on the same day, then what is the value of x?
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