Question

What is the ratio between the circumference to the diameter of a circle?

• A. 6.28
• B. 3.14
• C. 9.42
• D. 1.57

Answer 1

The correct option is B

3.14

Consider a circle of radius 'r'.
Then, circumference = 2$\pi$r
and diameter = 2r

Ratio of Circumference to diameter
= $\frac{2\pi \left(r\right)}{2\left(r\right)}$
= $\pi$ = 3.14

This ratio remain constant irrespective of radius 'r'.