alleryWhat is the curved surface area of a hemisphere of radius r?
Aπr2
B4πr2
C2πr2
D3πr2
Answer & Solution
Correct answer: C. 2πr2
1. A full sphere has surface area 4πr2.
2. A hemisphere's curved part is half of it.
3. So the curved surface area is 2πr2.
_Source: NCERT Class 10 Mathematics, Chapter 12 Surface Areas and Volumes, 12.2_
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