Question

A copper wire when bent in the form of square encloses an area of 121 sq.cm . If the same wire is bent into the form of a circle , find the area of the circle.

Answer 1

area of square =121 sq cm
side(side) = 11 cm
square of 11
area of circle=πr×r put value of r is 11 cm
22/7×11×11

Answer 2

area of square =side *side
121. = 11*11
So side =11cm
perimeter = 4*11
=44cm
So perimeter = 2*22/7*radius
44. =2*22/7*radius
22. =22/7*radius
7. = radius

so area of circle = 22/7*7*7
=22*7
=154 sq cm