Question

Calculate the radius of a circle whose circumference is $44cm$?

• A. $7cm$.
• B. $14cm$.
• C. $21cm$.
• D. None of these

Answer 1

Answer: (A)

$7cm$.

Given: Circumference of circle $=44cm$

$\Rightarrow 2\pi r=44$

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

$\Rightarrow r=44\times \frac{1}{2}\times \frac{7}{22}$

$\Rightarrow r=7cm$

$\therefore$ Radius of circle $r=7cm$

Hence, $\text{A}$ is the correct option.