Question

Question 56

The side of the square of area $9y^2$ is ___

Answer 1

$3y$
Given, area of a square =$9y^2$
We know that, the area of a square with side $a=a^2$
$\begin{array}{cc}\therefore & a^2=9y^2\\ \Rightarrow & a^2=(3y{)}^2\\ \Rightarrow & a=3y\end{array}$
[taking square root both sides]