- A8.8 h
- B12 h
- C11 h
- D9 h
Step-by-Step Solution
B takes h. In 4 h: . B fills h. (12 h is 16 − 4.)
Answer: A) 8.8 h
Pipe A fills a tank in 20 hours, and pipe B is 25% more efficient than A. They work together for 4 hours, after which A is closed. How long does B take to finish?
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