- A20 h
- B
- C30 h
- D24 h
Step-by-Step Solution
In 2 h all three fill fill in 10 h → per hour. → 24 h. (20 h is C.)
Answer: D) 24 h
Pipes A, B and C together fill a tank in 8 hours. All three are opened, but after 2 hours C is closed, and A and B take another 10 hours to finish. If A alone takes 30 hours, how long would B alone take?
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