Three taps A, B, C can fill an overhead tank in 4, 6 and 12 hours respectively.

Question

Three taps A, B, C can fill an overhead tank in 4, 6 and 12 hours respectively. How long would the three taps take to fill the tank if all of them are opened together ?

Options:

A . 2 hours

B . 4 hours

C . 3 hours

D . 5 hours

Answer: Option A

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