Question

A square paper has an area of $144{\text{cm}}^2.$ Find the dimension of each side.

• A. $12$
• B. $12\text{cm}$
• C. $\sqrt{12}\text{cm}$

Answer 1

The correct option is B $12\text{cm}$

The dimension of each side of the square paper is the square root of the given area.

Suppose the dimension of each side of the square paper is $a\text{cm}.$

$\therefore a=\sqrt{144}\text{cm}$
$\Rightarrow a=\sqrt{12\times 12}\text{cm}$
$\Rightarrow a=\sqrt{{12}^2}\text{cm}$
$\Rightarrow a=12\text{cm}$

$\therefore$ Dimension of each side is $12\text{cm}.$