Question

total total surface area of hemisphere

Answer 1

Answer: The total surface area of a hemisphere is 3πr².

Step-by-step explanation:

We know that the total surface area of a sphere is 4πr². Let us assume that it is a hollow sphere.

Let us cut the sphere to get a hemisphere without a top. Since this is exactly half of the sphere, its surface area is 2πr².

Again, let us add a circle on top of the hollow hemisphere to complete the hemisphere. As we know that the surface area of circle is πr², the total surface area of hemisphere will become

2πr²+πr²

=>3πr²

Answer 2

Answer:

$3 \pi r^2$

Step-by-step explanation:

$\text{Total Surface Area of Hemisphere = Curved surface Area + Area of base}\\\\= (2 \pi r^2) + \pi r^2\\\\= \boxed{\boxed{\bold{3 \pi r^2}}}$