Question

What is tsa and csa of hollow cylinder and hollow hemisphere ?

Answer 1

CSA of cylinder = 2πrh
TSA of cylinder =2πr(r+h)

CSA of hemisphere= 2πr²
TSA of hemisphere= 3πr²

Answer 2

Answer:

Curved surface area of a hollow cylinder = 2 π R h + 2 π r h

The total surface area of a hollow cylinder is 2π ( r1 + r2 )( r2 - r1 +h)

surface area of a hemisphere is:  2πr2

Lateral Surface Area of a hollow cylinder = L=2πr1h+2πr2h