3. side. (1) (2) Consider a wall heated by convection on one side and cooled by convection on the other Express the heat transfer rate through the wall in terms of T1, T2, hi, h, A-wall surface area, wall thickness, Ax, and wall thermal conductivity, k. One side of the wall (heating) has the air temperature 200°C, while the other side of the wall is exposed to a convection environment (cooling) having 100°C. The convection heat transfer rate is estimated to be h₁-20W/m²-°C on the 200°C side, and that on the 100°C side is hy-45 W/m²-°C. The wall has k-2.0W/m-°C and is 40 cm thick. Calculate the heat transfer rate through the wall per unit area. x=40cm