- A3 h
- B2.4 h
- C2 h
- D2.5 h
Step-by-Step Solution
B takes 6 h. Hour 1: . Hour 2: , total . Then net ; takes 0.4 h. Total 2.4 h.
Answer: B) 2.4 h
Pipe A fills a tank in 3 hours. Pipe B, half as efficient as A, is opened 1 hour after A, and pipe C, which empties the tank in 12 hours, is opened 1 hour after B. How long after A was opened is the tank full?
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