Question

Question 6
Find the length of the side of a square whose area is $441m^2$?

Answer 1

Let the length of side of a square be x meter.

Area of square $=(\text{side}{)}^2=x^2$

According to question,

$x^2=441\Rightarrow x=\sqrt{441}=\sqrt{3\times 3\times 7\times 7}=3\times 7\left(Byprimefactorization\right)\Rightarrow x=21m$

Hence, the length of side of a square is 21m.