Subtopic: Steady state heat transfer in conduction, convection and radiation
Question Statement:
A cold store flat wall of area $20.0\text{ m}^2$ consists of a $100\text{ mm}$ thick cork insulation layer ($k = 0.04\text{ W/(m}\cdot\text{K)}$). The inside wall surface is maintained at $-10.0^\circ\text{C}$ and the outside surface is at $+30.0^\circ\text{C}$. The rate of heat conduction through the wall in watts is ________ (answer in integer).