Question

If the volume of right cylinder with radius $2cm$ is $100\pi {cm}^3$, then the height of cylinder ($incm$) is

• A. $20$
• B. $25$
• C. $40$
• D. $50$

Answer 1

The correct option is B $25$

Volume of right cylinder $=$ $\pi r^{2}h$
Volume given is $=$ $100\pi c{m}^3$, $r=2cm$
Substitute the values, we get
$100\pi =\pi \times 2^2\times h$

$\therefore 100\pi =4\pi h$
$\therefore h=25$