Question

The area of a square is $225c{m}^2$. The perimeter of square will be

• A. $15cm$
• B. $25cm$
• C. $45cm$
• D. $60cm$

Answer 1

The correct option is D

$60cm$

Since area = $225c{m}^2$

Area of square = $\mathrm{side}\times \mathrm{side}$

$$\begin{gathered} \Rightarrow 225={\left(\mathrm{side}\right)}^2 \\ \Rightarrow \sqrt{225}=si\mathrm{de} \\ \Rightarrow 15cm=side \end{gathered}$$

Perimeter of square = $4\times side$

$$\begin{gathered} =4\times 15 \\ =60cm \end{gathered}$$