A $2\mathrm{.}2-$m$-$diameter spherical steel tank filled with iced water at $0C$ is buried underground at a location where the thermal conductivity

of the soil is $k=0\mathrm{.}55\frac{W}{m}*K.$ The distance between the tank center and the ground surface is $2\mathrm{.}4$ m $.$ For a ground surface temperature

of $19C,$ determine the rate of heat transfer to the iced water in the tank. What would your answer be if the soil temperature were $19C$

and the ground surface were insulated?

The steady rate of heat transfer from the tank is

W$.$

The steady rate of heat transfer from the tank when the ground surface is insulated is

W$.$