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
FeedbackBecause 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
C.6πr2
D.8πr2
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