- A11:45 a.m.
- B11:30 a.m.
- C12 noon
- D11:40 a.m.
Step-by-Step Solution
By 11 a.m. A fills . Then per hour; min → 11:45 a.m. (12 noon is A alone.)
Answer: A) 11:45 a.m.
A tank can be filled by pipe A in 2 hours and by pipe B in 6 hours. At 10 a.m. A is opened on the empty tank, and at 11 a.m. B is also opened. At what time will the tank be full?
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