Question

The ratio of circumference to the area of a circle of radius r units is​

Answer 1

Answer:

Circumference of circle = 2pi R

Area of Circle = pi R^2

Ratio = Circumference of Circle/Area of Circle

=> Ratio = 2pi R/ pi R^2

=> Ratio = 2/R

Hence,

Ratio = 2:R

Explanation:

Answer 2

Answer:

Given :-

• Radius = r

To Find:-

Ratio of circumference and area

Solution:-

Let the Circumference be C and Area be A

C/A = 2πr/πr²

C/A = 2 × π × r/ π × r × r

C/A = 2 × r/ r × r

C/A = 2/r

Hence:-

Ratio => 2:r