Question

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

Answer 1

a^2 = 121

so a =11

perimeter of square = 4 into side = 4 into 11 = 44 cm

perimeter of circle = 44

2 into 22/7 into r = 44

r= 44/2 into 7/22

r= 7 cm

area of circle = 22/7 into 7 into 7

area = 154 sq.cm