Question

If the circumference of a circular sheet is $154$ m. Find its radius. Also find the area of the sheet.

Answer 1

Given that circumference of circle $=154$ m

$\Rightarrow 2\times \pi r=154$

$\Rightarrow r=\frac{154}{2\pi }$

$\Rightarrow r=\frac{154\times 7}{2\times 22}$
$\Rightarrow r=\frac{49}{2}=24.5$ m
$\therefore$ Radius of circle $=24.5$ m
Area of circle A $=\pi r^2$
A $=\frac{22\times 49\times 49}{7\times 2\times 2}=\frac{3773}{2}=1886.5m^2$ .