Explanation:

Correct option 2: 140 meters

- Let the length be 7x and the breadth be 3x (ratio 7:3).

- The difference between length and breadth = 7x - 3x = 4x.

- It is given that breadth is 28 metres less than length, so 4x = 28 ? x = 7.

- Length = 7x = 7 × 7 = 49 metres.

- Breadth = 3x = 3 × 7 = 21 metres.

- Perimeter of rectangle = 2 × (Length + Breadth) = 2 × (49 + 21) = 2 × 70 = 140 metres.