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Perimeter of a Square

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Question

A square board has an area of $121$ sq cm. What is its perimeter?

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Solution

$\begin{matrix} A r e a o f s q u a r e b o a r d = 121 s q . c m ∴ s i d e o f s q u a r e b o a r d = \sqrt{121} [A r e a o f s q u a r e = {(s i d e)}^{2}] s i d e = 11 c m T h e n p e r i m e t e r o f s q u a r e b o a r d = 4 \times s i d e = 4 \times 11 = 44 c m \end{matrix}$

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