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- If two solid hemispheres of same base radii r, are joined together along their bases, then curved surface area of this new solid is
Question 1:
If two solid hemispheres of same base radii r, are joined together along their bases, then curved surface area of this new solid is A. 2πr2
B. 4πr2
Feedback Because curved surface area of a hemisphere is and here we join two solid hemispheres along their bases of radii r, from which we get a solid sphere.
Hence the curved surface area of new solid = 2πr2 + 2πr2 = 4πr2
Hence the curved surface area of new solid = 2πr2 + 2πr2 = 4πr2
C. 6πr2
D. 8πr2
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