Question

What is the circumference of a circle of radius 7 cm?

• A. 66 cm
• B. 198 cm
• C. 19.8 cm
• D. 22 cm

Answer 1

The correct option is

D

66 cm

The formula for circumference of a circle is given by $2\pi r$
where $r$ is the radius of the circle.

Given, $r=7$ cm

Then, circumference = $2\pi \times 7$

= $2\times \frac{22}{7}\times 7$

= $44$ cm