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+clear;
+clc;
+
+//Example13.6[Radiation Heat Transfer in a Black Furnace]
+//Given:-
+F12=0.2;
+A=5*5;//Area of 1 surface of cube[m^2]
+Tb=800,Tt=1500,Ts=500;//Temperature of base top and the side surfaces of the furbace[K]
+//Solution:-
+F11=0;
+Q11=0;
+F13=1-F11-F12;
+Q13=A*F13*(5.67*10^(-8))*((Tb^4)-(Ts^4));//[kW]
+disp("kW",round(Q13/1000),"The net rate of heat transfer from surface1 to surface3 is")
+Q12=A*F12*(5.67*10^(-8))*((Tb^4)-(Tt^4));//[kW]
+disp("kW",round(Q12/1000),"The net rate of radiation heat transfer from siurface1 to surface2 is")
+Q1=Q11+Q12+Q13;//[kW]
+disp("kW",round(Q1/1000),"Rhe net radiation heat transfer from the base surface is")