Question

The circumference of a circle is $44cm$. Then the area of circle is:

• A. $276c{m}^2$
• B. $44c{m}^2$
• C. $176c{m}^2$
• D. $154c{m}^2$

Answer 1

The correct option is D $154c{m}^2$

Let the length of radius of circle be $r$cm

Circumference of circle $=2\pi r$

$44=2\times \frac{22}{7}\times rr=\frac{44\times 7}{44}=7r=7cm$

Area of circle $=\pi r^2$

$=\frac{22}{7}\times 7\times 7=154c{m}^2$