Question

If the height of a cylinder is doubled and radius remains the same, then volume will be​

Answer 1

Let, the radius and height of the cylinder ber and h respectively.

$\therefore \text{Volume of the original cylinder}=\pi r^{2}h$

According to the question,
New radius = r and new height = 2h

$\therefore \text{Volume of the new cylinder}=\pi \left(r{)}^2\right(2h)$
$=2\pi r^{2}h$
$\Rightarrow$ The volume will become double of the original volume.

Hence, option (A) is the correct answer.