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If two solid hemispheres of same base ra...

If two solid hemispheres of same base radius r units are joined together along their bases, then curved surface area of this new solid is

A

`4pir^(2)` sq. units

B

`6pi^(2)` sq.units

C

`3pir^(2)` sq.units

D

`8pir^(2)` sq.units

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A
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