alleryA pipe alone fills a tank in 15 minutes; with a second pipe it takes 6 minutes. The second pipe alone takes
A10 minutes
B12 minutes
C8 minutes
D9 minutes
Answer & Solution
Correct answer: A. 10 minutes
Second pipe rate is 1/6 - 1/15 = 3/30 = 1/10, so 10 minutes.
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