Question

The total surface area of a solid hemisphere is $675\pi \text{sq. cm}$. Find the curved surface area of the solid hemisphere.

Answer 1

Let the radius of the hemisphere be $r$.

$3\pi r^2=675\pi \text{sq. cm}$
$\Rightarrow r^2=225$

Now the curved surface area of the solid hemisphere,
$CSA=2\pi r^2$

$=2\pi \times 225$

$=450\pi \text{sq. cm}$