# Ex.6.4 Q6 Squares and Square Roots - NCERT Maths Class 8

Go back to 'Ex.6.4'

## Question

Find the length of the side of a square whose area is \(441\;\rm{m^2}\) .

## Text Solution

**What is known?**

Area of the square

**What is unknown?**

Length of the side of a square

**Reasoning:**

Since, area of a square is equals to square of its side.

The length of the side can be calculated by finding the square root of the area.

**What is known?**

Area of the square

**What is unknown?**

Length of the side of a square

**Steps:**

Area of the square =side of a square \( \times \) side of a square

\[\begin{align}441\;\rm{m^2} = \text{(side of a square)}^2\end{align}\]

\({\text{Side of a square}} = \;\sqrt {441}= 21\;{\rm{m}}\)