Question

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

Answer 1

no, its not correct.

Answer 2

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.