- A8 h
- B9 h
- C6 h
- D7 h
Step-by-Step Solution
First 2 h: . New rate ; takes 6 h. Total 8 h. (9 h assumes the clog from the start.)
Answer: A) 8 h
Once a pipe has been open for 2 hours, its rate falls by one-third because of a clog. When clean it fills a tank in 6 hours. How long does it take in all to fill the empty tank?
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