Question

If area of a square is 400 CM square what is perimeter

Answer 1

Answer:

• The Perimeter of square = 80 cm.

Given :

• Area of a square is 400 cm².

To find :

• Perimeter of square =?

Step-by-step explanation:

Area of square = 400 cm [Given]

Area of square = side²

Substituting the values, we get,

side² = 400

side = √400

side = 20.

So, the side of square = 20 cm

Now,

Perimeter of square = 4 × side

Substituting the values in the above formula, we get,

= 4 × 20

= 80 cm.

Thus, The Perimeter of square = 80 cm.

Answer 2

Answer:

80 cm.

Solution

$\tt{Area \: of \: square \: is \: 400 \: cm \: sq.} \\ \: \: \: \: \: \: \tt{we \: know \: area \: of \: square \: mean } \\ \: \: \: \: \: \: \tt{ sides \: of \: square .}$

$\leadsto \tt{{x}^{2} = 400.} \\ \leadsto \tt{ x = \sqrt{400} } \\ \leadsto \tt{x = 20.}$

$\tt{Perimeter \: of \: Square \: is } \\ \tt{ sum \: of \: it's \: four \: sides.}$

$\leadsto \tt{20 \times 4 = 80 \: cm.}$

Therefore, the perimeter of square be 80 cm.