A. 16 hours
B. 15 hours
C. 18 hours
D. 17 hours
Explanation:
Let the leak can empty the full tank in x hours 1/6 – 1/x = 1/9
=> 1/x = 1/6 – 1/9 = (3 – 2)/18 = 1/18
=> x = 18.
Correct Answer: 18 hours ✔
Last Updated: February 08, 2020
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