Question

What is the perimeter of the rectangle. If ratio between length and breadth is 4 : 5 and area of the rectangle is 180 square cm?.
1. 18 cm
2. 54 cm
3. 27 cm
4. 45 cm

Answer 1

Correct Answer - Option 2 : 54 cm

Given:

Area of rectangle = 180 cm²

Calculation:

Let be assume the length and breadth of the rectangle is 4x and 5x respectively

⇒ (4x) × (5x) = 180

⇒ x² = 9

⇒ x = 3

Length = 12 cm, and Breadth = 15 cm

⇒ Perimeter of the rectangle = 2 × (Length + Breadth)

⇒ 2 × (12 + 15) = 54 cm.

∴ The required result will be 54 cm.