- A14.4
- B15
- C6.5
- D16.5
Step-by-Step Solution
Net rate = 1/9 − 1/24 = 8/72 − 3/72 = 5/72 per hour, so the tank is full after 72/5 = 14.4 hours.
Answer: A) 14.4
An inlet fills a tank in 9 hours while an outlet empties the full tank in 24 hours. If both are left open on an empty tank, how many hours pass before it is full?
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