1. The problem statement, all variables and given/known data See attached figure. Ta>Tb. Show that the rate of energy conducted dQ/dt is 2*pi*L*k((Ta-Tb)/Ln(b/a)) 2. Relevant equations 3. The attempt at a solution I seem to be lost at deriving an equation for the medium area, A. I understand the tansfer from low temp area to high. Pcond. is proportional to change in temp from H to L temp areas. I have attached my attempt at a soln.