Question

Find the length of the side of a square whose area is $441 \;m^2$

Answer 1

Let the length of the side of the square be $x$ $m$.
Area of square = $(x)^2$
= $441 \;m^2$
$x = \sqrt{441}$
The square root of $441$ can be calculated as follows.

| 21
---|---
2| \bar 4$$\bar 4\bar 1
-4
41| 041
41
| 0

∴ $x = 21 \;m$

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