Question
A pipe fills a tank in 10 hours, while a leak empties it in 15 hours. How long will the tank take to fill?
Select an option. Your answer will be checked instantly.
Correct Answer: A. 30 hours
Explanation:
The net rate is 1/10 - 1/15 = 1/30 tank per hour.
Therefore, the tank fills in 30 hours.
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