Question

awn about thermal conductivities
A hollow sphere of inner radius R and outer radius 2R is made from a material of thermal conductivity
K. It is surrounded by another hollow sphere of inner radius 2R and outer radius 3R made by material
of thermal conductivity 2K. The inside of smaller sphere and outside of bigger sphere are maintained at
0°C and 70°C respectively. Temperature of interface in steady state, will be
(1)20°C
(2)40°C
(3)50°C
(4)60° C​

Answer 1

Answer:

mam it will be 60 degrees