Correct Answer - Option 2 : 25 days

**Given**

Sudhir can complete his office project in 30 days

**Formula Used**

Work = Time × Efficiency

**Calculation**

Let the days taken by Kavita to complete the project be x

Kavita is 20% more efficient than Sudhir.

The ratio of efficiency of Kavita and Sudhir = 120 : 100 = 6 : 5

⇒ Proportion of time taken to complete the project

⇒ 6 : 5 : 30 : x

⇒ 6/5 = 30/x

⇒ x = {(5 × 30)/6}

⇒ x = 25 days

**∴ Kavita will take 25 days to complete the work.**