Correct Answer - Option 3 : 84

**Given:**

Efficiency of Amit = 2 × Efficiency of Ramit

**Concept used:**

Total work = Efficiency × Time period

**Calculation:**

The efficiency of Amit = 2

Efficiency of Ramit = 1

Total work = (2 + 1) × 28 = 3 × 28 = 84

Number of days Ramit takes to complete the whole work = 84/1 = 84

**∴ The number of days in Ramit will complete the work is 84 days.**