alleryPipe A fills a tank in 4 hours and pipe B in 12 hours. What fraction do both fill in one hour?
A1/6
B1/8
C1/16
D1/3
Answer & Solution
Correct answer: D. 1/3
In one hour they fill 1/4 + 1/12 = 3/12 + 1/12 = 4/12, which is 1/3.
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