Question

If the circumference of a circular sheet is 154 m, find its radius. Also find the area of the sheet. (Take $\pi$ = $\frac{22}{7}$ )

Answer 1

Circumference = $2\pi r$ = $154\; m$

$2\times\frac{2}{7}\times r$ = $154$

$r$ = $154\times \frac{7}{44}=\frac{49}{2}=24.5\;m$

Area = $\pi r^2$

= $\frac{22}{7}\times r^2$

= $\frac{22}{7}\times \frac{49}{2}\times \frac{49}{2}$

= $1886.5\;m^2$