- 10.5 hours
- 11 hours
- 13 hours
- 14 hours

Option 1 : 10.5 hours

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**Given**

(2/5)th of the container filled in 7 hours

**Calculation**

(2/5)th of the container is filled in 7 hours

Remaining part of the container to be filled = [1 - (2/5)]

⇒ 3/5

2/5 th of the container is filled in 7 hours

Container is filled in (7 × 5/2)

⇒ 17.5 hours

3/5 th of the container is filled in (17.5 × 3/5) hours

⇒ 10.5 hours

**∴ Remaining container is filled in 10.5 hours.**

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