Question

1 The area of the base of Solid hemisphere is 36cm2 . . Its curved surface area is A) 36 cm 2 b) 72cm 2 c) 108cm 2 d) 98cm 2 Is the correct option is A ?

Answer 1

Answer:

B) 72 cm ^2

Step-by-step explanation:

Given: - πr^2 = 36 cm^2

C. S. A= 2πr^2

= 2×36

= 72 cm^2

Answer 2

Its curved surface area is 72 cm².

No, the correct option is option (B).

-------------------------------------------------------------------------------------------------

Let's understand a few concepts:

The base of a solid hemisphere is in the shape of a circle so we will calculate the area of its base by the following formula:

$\boxed{\bold{Area \:of\:a\:circle = \pi r^2}}$

We will calculate the curved surface area of a solid hemisphere  by the following formula:

$\boxed{\bold{C.S.A. \:of\:a\:solid\:hemisphere = 2 \pi r^2}}$

-----------------------------------------------------------------------------------------

Let's now solve the given problem:

The area of the base of the solid hemisphere = 36 cm²

Let "r" cm be the radius of the solid hemisphere.

So, we can form the equation as,

$\pi r^2 = 36$ . . . (1)

The curved surface area of the solid hemisphere is,

= $2 \pi r^2$

on substituting from equation (1), we get

= $2 \times 36$

= $\bold{72\:cm^2}$

Thus,

The curved surface area of the solid hemisphere is 72 cm².

No, the correct option is option (B).

-------------------------------------------------------------------------------

Learn more about the above concept from brainly.in:

brainly.in/question/11768561

brainly.in/question/8611132