The total heat loss from the two surfaces of the plate is

Question

A plate having 10 cm² area each side is handing in the middle of a room of 100 m² total surface area. The plate temperature and emissivity are respectively 800 K and 0.6. The temperature and emissivity values for the surfaces of the room are 300 K and 0.3 respectively. Boltzmannn constant $\sigma$ = 5.67 ´ 10^–8 W/m²K⁴. The total heat loss from the two surfaces of the plate is                                                                           

      (a) 13.66 W                                                        (b) 27.32 W

      (c) 27.87 W                                                        (d) 13.66 MW