Consider a plane wall of thickness L=8 cm whose area for conduction varies according to the function A(x) = Ao(1 + ax) m, where Ao = 1 m and a = 5 m-. The wall surfaces are maintained at temperature T = 50C and T = 10C. Assuming one-dimensional steady condition in the wall, use Fourier's law to find the heat transfer if the thermal conductivity varies with temperature as k(T) = Ko(1+BT)W/mK where Ko = 3 W/mK and = 0.02 C-.