Question

The curved surface area of a hemisphere of diameter $2r$ is:

• A. $2\pi r^2$
• B. $3\pi r^2$
• C. $4\pi r^2$
• D. $8\pi r^2$

Answer 1

The correct option is A $2\pi r^2$

Diameter of the hemisphere= $2r$

$\therefore \text{Radius}=\frac{2r}{2}=r\text{cm}$

Curved surface area of hemisphere$=2\pi r^2$