Question

The curved surface area of a cylinder is $1320c{m}^2$ and its base has a radius of $10.5cm$. Find the height of cylinder.

Answer 1

Given: Radius of the base of the cylinder $=10.5cm$

The curved surface area of cylinder $=2\pi rh$

The curved surface area of the given cylinder is $1320c{m}^2$

$\therefore 1320=2\times \frac{22}{7}\times 10.5\times h$ [$\because h=$ height of the cylinder]

$\Rightarrow h=\frac{(1320\times 7)}{(2\times 22\times 10.5)}$

$\Rightarrow h=20cm$