Question

The curved surface area of a cylinder is $1980{cm}^2$ and the radius of its base is $15cm$. Find the height of the cylinder.$(\pi =\frac{22}{7})$

Answer 1

Given:Radius of the cylinder$=15cm$

Curved surface area$=2\pi rh=1980{cm}^2$

$\Rightarrow 2\times \frac{22}{7}\times 15h=1980$

$\Rightarrow h=\frac{1980\times 7}{2\times 22\times 15}=21cm$

$\therefore$ height of the cylinder$=21cm$