Question

The length of the side of a square whose area is $16.81m^{2}is$ m.

• A. 4.1
• B. 6.9
• C. 4.9
• D. 7.1

Answer 1

The correct option is A 4.1

If the side of square is a, its area is a².
According to question,
$a^2$ = 16.81
$\text{Side of the square, a}=\sqrt{16.81}$
Since, 16.81 is decimal, we use long division method to find its square root.
$$\begin{array}{cc}& 4.1\\ 4& 16.81\\ & 16\downarrow \\ 81& 81\\ & 81\\ & 0\end{array}$$
$\sqrt{16.81}=4.1$
$\therefore \text{Side of the square, a}=4.1m$