Question

Tap A can fill a tank in 3 hours. Tap B takes 8 hours to fill the same tank.What fraction of the tank can be filled by both taps in 2hours?​

Answer 1

11/12

Explanation:

Tap A

1 tank / 3hr = 1/3 tank/1hr

Tap B

1 tank / 8 hr = 1/8 tank /1hr

Tap A + Tap B X 2hr

(1/3/hr +1/8/hr) * 2hr = 2/3 + 2/8 (the hr cancels out) = 8/12 + 3/12 = 11/12

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