A black wood stove with surface area 4.6 \rm{ m^2} is made from cast iron 4.0 \rm mm thick. The interior wall of the stove is at 650 \rm { ^\circ C}, while the exterior is at 647 \rm { ^\circ C}. the rate of heat conduction through the stove wall is 280 kW. the rate of heat loss by radiation from the stove is 190kW.
find how much heat the stove loses by a combination of conduction and convection in the surrounding air.