Question

If the perimeter of a square is equal to the circunference of a circle then the ratio of their areas is
(a) 4:11
(b) : 4
(C):7
(d) 7:71​

Answer 1

Answer:

We know, perimeter of square = 4*side and circumference of circle= 2*pi*r

Let the side be 's' and radius be 'r'.

Now, 4s = 2*pi*r

=> s = pi*r/2

Area of square = $s^{2}$

and area of circle = pi * $r^{2}$

Required ratio = Area of square / Area of circle = pi / 4

Answer = pi / 4

Answer 2

Step-by-step explanation:

area of square= a2

area of circle = pie r2

perimeter of square =4a

perimeter of circle = 2 pie r