Boundary value problem for heat conduction

[Jennifer_88]

Hi,

I am trying to work this problem out but I don't know how to solve the boundary value. here is the problem statement




thanks in advance

 

[AlephZero]

Solve the heat conduction problem for a spherical shell of clay with inside radius 2cm at 82C, and outside radius R at 13C.

Then find the limit as R goes to infinity.