A sphere has a diameter of 24in. A hemisphere has a radius of 18 in. Franco says the surface area of the sphere is greater than the surface area of the hemisphere. Do you agree? explain

Question

anonymous · Answer

no, its not correct.

anonymous · Answer

surface area of sphere= $$4\Pi r ^{2}$$
surface area of hemisphere= $$3\Pi r ^{2}$$
in case of sphere, the radius is 12 inch, hemisphere has radius 18 inches
put those values in the equations, u can easily compare.