If the perimeter of a square is 20 cm, then what is its area?

Correct option is C

Given:

Perimeter of the square = 20 cm

Formula Used:

​$$\text{Side} = \frac{\text{Perimeter}}{4}, \quad \text{Area} = \text{Side}^2$$​​

Solution:

​$$\text{Side} = \frac{20}{4} = 5 \text{ cm}$$​

​$$\text{Area} = 5^2 = 25 \text{ cm}^2$$​