- A4 h
- B6 h
- C7 h
- D5 h
Step-by-Step Solution
First 2 h: . A fills the other half in 5 h. Total = 7 h.
Answer: C) 7 h
Pipes A, B and C fill a tank in 10, 12 and 15 hours. A stays open throughout, while B and C are open only for the first 2 hours. How long does the empty tank take to fill?
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