Question

Evaluate the given limit :
$\underset{r\to 1}{lim}\left(\pi r^2\right)$

Answer 1

Given : $\underset{r\to 1}{lim}\pi r^2$
Substituting $r=1$
$=\pi (1{)}^2$
$=\pi$
$\therefore \underset{r\to 1}{lim}\left(\pi r^2\right)=\pi$