- A8.25
- B22
- C11
- D7.5
Step-by-Step Solution
Combined rate = 1/11 + 1/33 = 3/33 + 1/33 = 4/33 per hour, so time = 33/4 = 8.25 hours.
Answer: A) 8.25
Pipe P fills a tank in 11 hours and pipe Q fills it in 33 hours. With both open, in how many hours is the tank full?
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