Question

the area of square field is 441m2 find its perimeter

Answer 1

area of the square =a^2 sq .m 
therefore 
a^2=441 sq .m
a=21m 
therefore 
perimeter of the square 
4*21=84 m

Answer 2

area of a square a² =441
a=21
perimetar of a square =4a
=4x21
=84 cm