Question

area of square is 441 sq.cm then find its perimeter

Answer 1

Area of square= a. a

Asquare=441
A=21
Perimeter of a square=4a
=4. 21
=84 cm

Answer 2

Area of square =441 sq.cm
So, a×a =441 sq. cm
a= 21 cm

Perimeter of square = 4a
= (4×21) cm
=84 cm..