If r is the radius of the sphere, then the surface area of the sphere is given by;
A. 4 π r2
B. 2 π r2
C. π r2
D. 4/3 π r2
Answer:A
If r is the radius of the sphere, then the surface area of the sphere is given by;
A. 4 π r2 B. 2 π r2 C. π r2 D. 4/3 π r2