Problem II.2 The thickness and thermal conductivity of a flat wall made of concrete are 10 mm and 0.1 W/m K, respectively. The difference between the temperatures of the inner and outer surfaces of the wall is 35 °C. Calculate the heat transfer by conduction in 2 h assuming that the wall surface area is 20 m².

Problem II.2 The thickness and thermal conductivity of a flat wall made of concrete are 10 mm and 0.1 W/m K, respectively. The difference between the temperatures of the inner and outer surfaces of the wall is 35 °C. Calculate the heat transfer by conduction in 2 h assuming that the wall surface area is 20 m².