A plane wall is compose of two material the inner material A=20cm and the out side surface tempreture 70 C , KA=15 w/mk and the internal heat generation 2x10^4 w/m^2 , the outer material B has thickness 10cm and thermal conductivity 30 but no heat generation , the left face is h=100 and the rate face has tempreture T=10c and

h= 25 W/m^2.k determine :

1. T interface
2. The maximum tempreture