Question

Curved surface area of a cylindrical pillar is 264 $m^2$ and its volume is 924 $m^3$ The diameter of the pillar is

• A. 5 m
• B. 10 m
• C. 14 m
• D. 9 m

Answer 1

Answer: (C)

14 m

$2\pi rh=264;\pi r^{2}h=924$
$\frac{2\pi rh}{\pi r^{2}h}=\frac{264}{924}$
$\Rightarrow \frac{2}{r}=\frac{2}{7}\Rightarrow r=7m$
$\therefore$ Diameter=14.m