Question

What is the radius of the circle whose circumference and area are numerically equal?

Answer 1

let
the radius of the circle = r units

area of the circle = circumference
pi*r^2 = 2*pi*r
r^2/r =(2*pi)/pi
r=2
therefore
radius=r=2 units

Answer 2

Answer:

area = circumference

πr^2 = 2πr

r^2 = 2r

r =2