- A8 min
- B10 min
- C6 min
- D12 min
Step-by-Step Solution
A runs all 18 min: . B must fill , taking min. So close B after 8 min.
Answer: A) 8 min
Pipes A and B fill a tank in 24 and 32 minutes. Both are opened together. After how many minutes should B be closed so that the tank is full in exactly 18 minutes?
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