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1. Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed and A and B can fill the remaining part in 6 hours. The number of hours taken by C alone to fill the tank is:
- A. 8 hours
- B. 8 hours
- C. 8 hours
- D. 8 hours
Answer: Option D
Explanation:
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