Two rods of diameter D and length L have one of the ends at 120 C and are exposed to air at 30 C. The conductivity of the material of one rod is 45 W/m 2 K and the temperature of the rod at the end is...

Two rods of diameter D and length L have one of the ends at 120C and are exposed to air at 30C. The conductivity of the material of one rod is 45 W/m²K and the temperature of the rod at the end is measured as 80C, while the end temperature of the other rod was 60C. Determine the conductivity of the other material.

temperature of the fi n at the tip which is insulated.