MathematicsWhich of the following is the curved surface area of hemisphere of diameter 2rcm?

Which of the following is the curved surface area of hemisphere of diameter $2 r$ cm?

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A
$2 π r^{2} {cm}^{2}$
B
$3 π r^{2} {cm}^{2}$
C
$4 π r^{2} {cm}^{2}$
D
$8 π r^{2} {cm}^{2}$

Solution:

Consider the given question,
Diameter

= 2 r

\Rightarrow

Radius

= r

∴

Curved surface area of hemisphere

= 2 π r^{2}

Hence, the curved surface area of a hemisphere is

2 π r^{2} {cm}^{2}

.
Therefore, option 1 is correct.

Which of the following is the curved surface area of hemisphere of diameter $2 r$ cm?

Solution:

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