Question

Find the radius (in cm) of a circle, whose circumference is 22 m.

Answer 1

Circumference of a circle of radius$=2\pi r$

$\therefore$ $22=2\pi r$

$\Rightarrow r=\frac{22}{2\pi }$

$\Rightarrow r=3.50m$ $\Rightarrow 350cm$