Question

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

Answer 1

here perimeter of square= circumference of the circle
let the Radius be x
Circumference=2πr
121=2×22/7×x
121=44/7×x
44x=121×7
x=121×7/44
x=77/4
x=19.25
we have to find the area of the circle
area of the circle=π×rsquare
=22/7×19.25×19.25
1164.625