An inlet pipe fills 1/8 part of a tank in 1 h. How much time will the pipe take to fill the empty tank?

4 h
2 h
6 h
8 h

Correct Answer: 8 h

Explanation:

We know that, when a pipe fills 1/m part of a tank in 1 h, then the pipe takes m h to fill the tank.
Here, 1/m = 1/8 ⇒ m = 8
∴ Required time to fill the tank = 8 h

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