An oven plate used for heating substances is 0.012111 thick. The top surface of the oven is exposed to air owing at 20C. In an experiment. the plate is heated by electrical heater positioned on the underside of the plate and the temperature is maintained at 120C. Calculate the temperature of the top surface. The plate is made of stain less steel with thermal conductivity of 16 W/m 0C. The convective heat transfer coefcient of air is 2.5 W/m2 C and the total area of the plate is In:2