Question

Find the radius of a cylinder with lateral surface area $704c{m}^2$ and height $16$ cm.

Answer 1

Lateral surface area of cylinder $=704{cm}^2$

$2\pi rh=\mathrm{704....}\left(1\right)$

$h=16cm$ (Given)

$\Rightarrow$ $2\pi r\left(16\right)=704$

$\Rightarrow$ $2\pi r=44$

$\Rightarrow$ $\pi r=22$

$\Rightarrow$ $\frac{22}{7}\times r=22$

$\Rightarrow$ $r=7cm$