- A8
- B15
- C12
- D10
Step-by-Step Solution
Together they fill of the tank. B fills the remaining 2/3 at 1/15 per hour, taking hours.
Answer: D) 10
Two pipes A and B can fill a tank in 10 hours and 15 hours respectively. Both are opened together, but after 2 hours pipe A is closed. How many more hours will pipe B take to fill the remaining tank?
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