Bihar Police Constable Model Paper 2

Given:
Area of the square = 400 m2
Formula Used:
Area of the square = a2
The perimeter of the square = 4 × a
Where a = side of the square
Calculation:
Area of the square = 400 m2
⇒ a2 = 400
⇒ a = √400
⇒ a = 20 m
The perimeter of the square = 4 × a
⇒ 4 × 20
⇒ 80 m
∴ The perimeter of the square is 80 m.