Question

A vessel in the form of a hollow hemisphere mounted by a hollow cylinder. The diameter of the hemisphere is 14cm and the total height of vessel is 13cm . Find the inner surface area of the vessel.

Answer 1

Radius of hemisphere = radius of cylinder= 7 cm
Height of cylinder= 13 cm - 7 cm = 6 cm
Inner surface area of vessel = Curved surface area of hemisphere part
=>2πrh+2πr^2
=>2πr( h+ r)
=>2*22/7*7(6+7)
=>572cm^2