Question

If the radius of a circle is 21 cm. Find its area and circumference.

• A. 152 cm
• B. 132 cm
• C. 142 cm
• D. 122 cm

Answer 1

The correct option is B 132 cm

Given:
Radius = 21cm
Therefore, Area $=\pi \times r^2\text{A}=\frac{22}{7}\times 21\times 21\text{A}=1386c{m}^2$
Circumference, C $=2\pi r$
C=$2\times \frac{22}{7}\times 21=132cm$