Question

The length of equator of the globe is $44$ cm. Find its surface area.

Answer 1

Length of the equator of the globe or circumference of a globe $=44cm$

Let radius $r=x$

Circumference of the globe =$2\pi r$

$\therefore 44=2\times \frac{22}{7}\times x$

$\Rightarrow x=\frac{44\times 7}{44}=7cm$

Then Surface area of the globe = $4\pi r^2=4\times \frac{22}{7}\times (7{)}^2=616c{m}^2$