Question

. If the perimeter of a square is 80 cm then its area is ______

(a) 800cm2 (b) 600 cm2 (c) 400 cm2

(d) 200cm2​

Answer 1

Step-by-step explanation:

perimeter of square=4s

80=4s

80/4=s

s=20cm

area of square=S²

(20)²

400cm²

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Answer 2

Given :

• Perimeter of square = 80 cm

To find :

Area of square

Formula used :

• P = 4s
• A = s²

Here,

• P = perimeter of square
• s = side of square
• A = area of square

Solution :

First of all we will find side of square by using Formula of perimeter of square.

➝ Perimeter of square = 4 × side

➝ 80cm = 4 × side

➝ side = 80 cm/4

➝ side = 20 cm

________________________________

Now we will find area by using formula of area of square

➝ Area of square = (side)²

➝ Area of square = (20 cm)²

➝ Area of square = 400 cm²

________________________________

ANSWER :

Option (c) 400 cm²