Determine the heat transfer rate per square meter of wall area for the case of a furnace with inside air at 1340 K. The furnace wall is composed of a 0.106-m layer of fireclay brick (kclay = 1.13 W/mK) and a 0.635-cm thickness of mild steel on its outside surface (ksteel = 42.9 W/mK). Heat transfer coefficients on inside and outside wall surfaces are 5110 W/m2K and 45 W/m2K respectively; outside air is at 295 K. What will be the temperatures at each surface and at the brick-steel interface?