Consider one-dimensional steady-state heat conduction across a wall (as shown in the figure below) of thickness 30 mm and thermal conductivity 15 W/m.K. At x = 0, a constant heat flux, q” = 1 × 105 W/m2 is applied. On the other side of the wall, heat is removed from the wall by convection with fluid at 25°C and heat transfer coefficient of 250 W/m2.K. The temperature  ( in °C), at x = 0 is