one end of a rod is inserted into a furnace ,while the other end projects in to outside air. Under steady state condition, the temperature of the rod at 50mm and 125mm from the furnace wall measured...

one end of a rod is inserted into a furnace ,while the other end projects in to outside air. Under steady state condition, the temperature of the rod at 50mm and 125mm from the furnace wall measured with the help of thermocouples indicates 125 degrees and 88.5degrees when the ambient temperature is 20 degrees find the temperature of th rod at the furnace wall