Question

If the curved surface area of a solid hemisphere is $2772sq.cm$, then find its total surface area(in $c{m}^2$).

Answer 1

The curved surface area of the solid hemisphere $=2772c{m}^2$

So,

$2\pi r^2=2772$

$r=21cm$

We know that the total surface area of the hemisphere is

$=3\pi r^2$

$=3\times \frac{22}{7}\times 21\times 21$

$=4158c{m}^2$

Hence, this is the answer.