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## Homework Statement

The density of the charge inside of the sphere is given-

ro=a*r+b/r

The electric potential on the outer layer of the sphere is phi=0

The radius of the sphere is 58.4m

r-is the distance from the center of the sphere

What is the electric potential when r=15.4m?

## Homework Equations

## The Attempt at a Solution

Basically, what I tried to do the to do the field equation and integrate it between 58.4 and 15.4.

That didnt work so im clueless to what I need to do.

4*pi*r^2*E=(4*pi*R^3)ro/3epsilon