Question

The circumference of a circle is double the perimeter of square having area 484cm^2.what is the area of circle?

Answer 1

circumference (c) = 2.per(Square

Explanation:

ar sq = l²

484 = l²

l = 22

again

p=4l=4×22=88cm

c = 2×p=2×88= 176cm

we know

c= 2πr

or, 176 = 2×22/7 × r

r = 28 cm

again

ar (circle) = πr²

= 22 / 7 × 28²=2464cm²