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The curved surface area of a hemisphere of radius r is:

Class 10Surface Area of Combined SolidsMensuration

A $2 * p i * r^{2}$
B $p i * r^{2}$
C $3 * p i * r^{2}$
D $4 * p i * r^{2}$

Step-by-Step Solution

CSA of a hemisphere = 2*π*

r^{2}

; its total surface area (including flat circle) = 3*π*

r^{2}

.

Answer: A)

2 * p i * r^{2}

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