Question

39. If two solid hemispheres of same radius are joined together along their bases. The surface area of this new solid is ​

Answer 1

Answer:

The surface area of this new solid is same

Answer 2

Answer:

We know that,

Curved surface area of a hemisphere =2πr ^2

 

So, when two solids hemispheres of same base radius are joined together along their bases, then

Curved surface area of newly formed solid sphere=2×2πr ^2

=4πr ^2

 

Hence, A is the correct option.

Step-by-step explanation: