Question

The diameter of a cone is $14cm$ and its slant height is $9cm$. Find the area of its curved surface.

• A. $198{cm}^2$
• B. $108{cm}^2$
• C. $152{cm}^2$
• D. $218{cm}^2$

Answer 1

The correct option is A $198{cm}^2$

Given, diameter of cone $14cm$

and slant height of cone$=9cm$.

Therefore, radius of cone$=\frac{14}{2}=7cm$.
Then,
curved surface area of cone$=\pi rl$

$=\frac{22}{7}\times 7\times 9=198c{m}^2$.

Therefore, option $A$ is correct.