Finding electric potential using charge density

[AMMax]

Homework Statement

a 5 cm radius conducting sphere has a charge density of 2x10^-6 C/m^2 on its surface. Its electric potential, relative to the potential far away is?

Homework Equations

I used V= K(q/r)

The Attempt at a Solution

Using the above equation I got 1.12 x 10^4. This seems too easy. I think I am missing something here.

 

[kuruman]

You are not missing anything. It is that easy.