Question

why is in the form of a circle of radius 42cm .it is bent into a square. find the side of the square( take X =22/7)

Answer 1

Radius of circle = 42 cm
Circumference of circle = 2*pi *r 
= 2*22*42/7
= 44*6
= 264 cm

Now,
Perimeter of square = circumference of square
4*side of squre = 264 cm
=> side of squre = 66 cm

Answer 2

circumference of the circle =perimeter of the square
2*pi *r= 4* s
r=radius ; s= side