Question

Circumference of a circle of radius 21 cm is

• A. 8 cm
• B. 88 cm
• C. 120 cm
• D. 132 cm

Answer 1

The correct option is D 132 cm

The circumference of a circle$=2\pi r,$ where $r$ is the radius of the circle.

Given that, radius = 21 cm
$\pi =\frac{22}{7}$
$\therefore \text{Circumference}=2\times \frac{22}{7}\times 21=132$ cm