- A4 h 30 min
- B3 h 30 min
- C4 h
- D3 h 45 min
Step-by-Step Solution
First half: 3 . Then 4 pipes fill at per hour; half the tank takes min. Total 3 45 min.
Answer: D) 3 h 45 min
A single pipe fills a tank in 6 hours. When the tank is half full, three more pipes of the same size are opened. How long does the whole filling take?
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