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If two solid hemisphere of same base joi...

If two solid hemisphere of same base joined together along their bases,then curved surface area of this new solid is

A

`3 pi r^2`

B

`4 pi r^2`

C

`5 pi r^2`

D

`6 pi r^2`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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