Question

Find the total surface area of a quadrant of a sphere of radius ‘r' .​

Answer 1

Answer:

Correct option is

C

3πr

2

The surface area of a sphere of radius r is 4πr

2

. Half of this is 2πr

2

.

If you have a hemispherical object then it has a base which is a circle of radius r.

The area of a circle of radius r is πr

2

and thus if the hemisphere is meant to include the base then the surface area is 2πr

2

+πr

2

=3πr

2

.

Answer 2

Answer:

Refer to above page.

2 pie r square

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