Question

What is the TSA and CSA of hollow hemisphere​

Answer 1

Answer:

Let, the radius of outer hemisphere is R

and the radius of inner hemisphere is r

CSA of hollow hemisphere = CSA of outer hemisphere - CSA of inner hemisphere

=2πR×R - 2πr×r

=2π( R×R-r×r).

TSA of hollow hemisphere = TSA of outer hemisphere - TSA of inner hemisphere

= 3πR×R-3πr×r

=3π(R×R-r×r).