Question

circumference of the circle with corresponding radius 'r'.

All dimensions are in cm

• A. 88
• B. 132
• C. 44

Answer 1

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

When r =7, $2\pi r=2\times \frac{22}{7}\times 7=44c{m}^2$

When r =14, $2\pi r=2\times \frac{22}{7}\times 14=88c{m}^2$


When r =21, $2\pi r=2\times \frac{22}{7}\times 21=132c{m}^2$