Question

The radius of the cylinder whose lateral surface area is $704c{m}^2$ and height $8cm$, is ___________.

• A. $6cm$
• B. $4cm$
• C. $8cm$
• D. $14cm$

Answer 1

The correct option is D $14cm$

Let radius of cylinder be $r$.

Lateral surface area$=2\pi rh$

$\Rightarrow 704=2\pi r\times 8$

$\Rightarrow r=\frac{704}{16\pi }=14$

$\therefore$ Radius of cylinder is $14$ $cm$.