Question

Find the perimeter of a square whose area is 400 M2
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Answer 1

Step-by-step explanation:

A=a2

P=4a

Solving For P

P=4A=4·400=80

Answer 2

Answer:

Perimeter = 80m

Step-by-step explanation:

$\rightarrow$ Let's find the side of the square first with the given area.

$\color{black}\boxed{\colorbox{saffron}{Area - side×side}}$

${400m}^{2} = side \times side \\ \\ = {400}^{2} = {side}^{2} \\ \\ = {20}^{2} = {side}^{2} \\ \\ 20 = side$

So, each side = 20m

ㅤ

$\rightarrow$ Now, it's find Perimeter with obtained side.

$\color{black}\boxed{\colorbox{saffron}{Perimeter-4×side}}$

$4 \times 20 \\ \\ = 80m$

So, perimeter =80m