sphere problem 2:
A sphere has a diameter of 12 cm.
a) calculate the surface area
b) calculate the volume
answer surface area:
radius = diameter : 2
radius = 12 : 2
radius = 6 cm
A = 4 * r² * π
A = 4 * 6² * π
A = 452.39 cm².
A: The surface area is 452.39 cm².
answer volume:
V = 4 * r³ * π : 3
V = 4 * 6³ * π : 3
V = 904.78 cm³
A: The volume is 904.78 cm³.