Question

Consider a sphere and a circle of the same radius.
What is the ratio of the total surface area of the sphere to the area of the circle?

• A. 2 : 1
• B. 1 : 2
• C. 4 : 1
• D. 1 : 4

Answer 1

The correct option is C 4 : 1

Area of a circle = $\pi r^2$
Surface area of a sphere = $4\pi r^2$

Surface area of a sphere : Area of a circle = $4\pi r^2:\pi r^2=4:1$