- A13.2
- B27.5
- C11
- D15
Step-by-Step Solution
Combined rate = 1/22 + 1/33 = 3/66 + 2/66 = 5/66 per hour, so time = 66/5 = 13.2 hours.
Answer: A) 13.2
A village tank is filled by pipe X in 22 hours and by pipe Y in 33 hours. If both pipes run together, how many hours will the tank take to fill?
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