Question

What is the surface area of a sphere?

• A. 4$\pi$$r^2$
• B. 2$\pi$$r^2$
• C. $\frac{4}{3}$$\pi$$r^2$
• D. $\frac{2}{3}$$\pi$$r^2$

Answer 1

The correct option is A

4$\pi$$r^2$

A sphere is a three dimensional figure (solid figure), which is made up of all points in the space, which lie at a constant distance called the radius, from a fixed point called the centre of the sphere.
It has only curved surface. Hence CSA of a sphere itself is its TSA.
And, surface area of a sphere is 4$\pi$$r^2$.