Mathematics
If two solid hemispheres of same base radius r are joined together along with their bases, then the curved surface of this new solid is
4πr2
6πr2
3πr2
8πr2
Mensuration
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Answer
Two hemispheres are joined along their bases hence, the surface area of new solid will be double the surface area of hemisphere.
Curved surface area = 2πr2 × 2 = 4πr2.
Hence, Option 1 is the correct option.
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