**The internal diameter of a hollow hemispherical vessel is 24 cm. It is made of a steel sheet which is 0.5 cm thick, What is the total surface area (in $$ cm^2 $$ ) of the vessel?** A) $$ 612.75\\pi $$ B) $$ 468.75\\pi $$ C) $$ 600.2\\pi $$ D) $$ 600.5\\pi $$ Click Link for Answer