The heat loss in $\left ( \frac{W}{m^{2}} \right )$ is.

Question

A brick wall $\left ( k=0.9\frac{W}{m.K} \right )$   of thickness 0.18m separates the warm air in a room the cold ambient air. On a particular winter day, the outside air temperature is –5⁰C and the room needs to be maintained at 27⁰C. The heat transfer coefficient associated with outside air is 20 W/m²K. Neglecting the convective resistance of the air inside the room, the heat loss in $\left ( \frac{W}{m^{2}} \right )$   is.                                                                                          

      (a) 88                                                                  (b) 110

      (c) 128                                                                (d) 160