Pipe A can fill an empty tank in 5 hours, while pipe B can empty the full tank in 6 hours. If both are opened at the same time when the tank is empty, how much time is required to fill the tank full?
- A. 10 hours
- B. 30 hours
- C. 25 hours
- D. 32 hours
ISRO Civil Engineering (CE) 2023 - Question 6
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