Directions: Carry Two Marks Each.
A brick wall $\bigg(k=0.9\frac{w}{m.k}\bigg)$ of thickness 0.18 m separates the warm air in a room from the cold ambient air. On a particular winter day, the outside air temperature is -5oC and the room needs to be maintained at 27oC. The heat transfer coefficient associated with outside air is 20$\frac{W}{m^2k}$. Neglecting the convective resistance of the air inside the room, the heat loss (in $\frac{W}{m^2}$) is
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