Question

Hello friend plz answer me​

Answer 1

hello how are you friend

Answer 2

Answer:

Actually none of the options is correct !!

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