How Do You Calculate Resistance in a Radial Cylinder System?

[asi123]

Homework Statement

Hey guys.
So I got this cylinder with radius R1, R2 and length L as you can see in the pic.
I need to find the resistance of the system for a current that goes from the inner cylinder to the outer cylinder (radial style ).

I uploaded my solution but I'm not so sure about it, can you please tell me if what I did is right?

Thanks in advance.

Homework Equations

The Attempt at a Solution

 

[wellan_house]

Hi, Not sure if you sorted this or not, but the correct solution I believe is:-

Resistance (ohms) = (Ln(R2)-Ln(R1)).ρ/(Pi.L)