Question

If the circumference of a circle is $264cm$, find its radius. Take $\pi =\frac{22}{7}$.

• A. $42cm$.
• B. $22cm$.
• C. $32cm$.
• D. None of these

Answer 1

The correct option is A $42cm$.

Let the radius be $rcm$

Given Circumference of a circle is $264cm$

$⟹2\pi r=264$

$⟹2\times \frac{22}{7}\times r=264$

$⟹r=\frac{264\times 7}{44}=42$

So the radius is $42cm$