Question

Find the lateral area for the cylinder with the given measurement
r= 4, h= 5

20 Pi square units

40 Pi square units

80 Pi square units

Answer 1

$\bf \textit{lateral area of a cylinder}\\\\ LA=2\pi rh~~ \begin{cases} r=radius\\ h=height\\ \cline{1-1} r=4\\ h=5 \end{cases}\implies LA=2\pi (4)(5)\implies V=40\pi$