Question

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

Answer 1

Circumference of a circle $=2\pi r=264cm$

$\Rightarrow r=\frac{264}{2\pi }=\frac{264\times 7}{2\times 22}$

$=\frac{132\times 7}{22}=\frac{66\times 7}{11}$

$=6\times 7=42cm$