Question

A tap can fill a container in 9 hours. Due to a leakage in its bottom, the container fills up in 10 hours. If the container is full, then in how much time the container will be emptied by the leakage?
1. 70 hrs
2. 80 hrs
3. 90 hrs
4. 100 hrs

Answer 1

Correct Answer - Option 3 : 90 hrs

Given:

A tap can fill a container in 9 hours

With leakage container can be filled in 10 hours

Concept:

If a tap can fill a tank in x hours, then the tank filled by the tap in 1 hour = 1/x of the total tank.

Calculation:

Part of the container emptied by the leak in 1 hours = (1/9) – (1/10)

⇒ (10 – 9)/90

⇒ 1/90

∴ The required time is 90 hours.