Question

The total surface area of a solid hemisphere of diameter $2cm$ is equal to:

• A. $12c{m}^2$
• B. $12\pi c{m}^2$
• C. $4\pi c{m}^2$
• D. $3\pi c{m}^2$

Answer 1

The correct option is D $3\pi c{m}^2$

The total surface area of a solid hemisphere of radius $r=3\pi r^2$.
Here, $r=\frac{2}{2}cm=1$cm
Therefore,
the total surface area $=3\pi (1{)}^2=3\pi c{m}^2$
Hence, option $D$ is correct.