A hollow sphere of inner radius R_(1)=0.25m and outer radius R_(2)=0.50 m is placed inside a heat reservoir of temperature T_(0)=1000^(0)C. The hollowsphere contains water at initial temperature 0^(0)C. The thermal conductivity of the material is K=(10^(2))/(4pi)W//m-K. The thermal resistance is

A hollow sphere of inner radius R_(1)=0.25m and outer radius R_(2)=0.5

1.	A hollow sphere of inner radius R_(1)=0.25m and outer radius R_(2)=0.50 m is placed inside a heat reservoir of temperature T_(0)=1000^(0)C. The hollowsphere contains water at initial temperature 0^(0)C. The thermal conductivity of the material is K=(10^(2))/(4pi)W//m-K. The thermal resistance is
Answer» `3xx10^(-2)` K/W `3xx10^(-3)` K/W `5xx10^(-2)KW^(-1)` `2XX10^(-4)` K/W Answer :C