Question

a wire,when bent in the form of a square,enclose the area of 196cm2. if the same wire bent to form a circle ,find the area of circle.

Answer 1

Square area =196cm²
S²=196cm²
S=√196cm²
S=13cm

Perimeter of square=4×13=>52cm


Perimeter of square=Circumference of circle
52cm=Circumference of circle

C=2πr
52=2×22/7×r
52×7/44=>r
8.27=r


A=πr²
=22/7×8.27²
=214.94cm²