The internal and external radii of a hollow hemispherical shell are 4 \(cm\) and 7 \(cm\), respectively. Find the C.S.A. and T.S.A. of the shell.
Answer:
Curved surface area of a hollow hemisphere is given by sq. units
The curved surface area of the shell \(=\) \(cm^2\)
Total surface area of a hollow hemisphere is given by sq. units
The total surface area of the shell \(=\) \(cm^2\)
[Note: Enter your answer up to two decimal places]