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+clear;
+clc;
+
+//Example2.16[Heat Conduction through a Spherical Shell]
+//Given:-
+r1=0.08;//Inner Radius[m]
+r2=0.1;//Outer radius[m]
+k=45;//Thermal conductivity[W/m.degree Celcius]
+T1=200;//Temperature of inner surface[degree Celcius]
+T2=80;//Temperarure of outer surface[degree Celcius]
+//Solution:-
+//Integrating the differential equation twicw we get T(r)=-C1/r+C2, where
+C1=r1*r2*(T1-T2)/(r2-r1);
+C2=((r2*T2)-(r1*T1))/(r2-r1);
+Q_sphere=4*%pi*k*r1*r2*(T1-T2)/(r2-r1);
+disp("kW",Q_sphere/1000,"The rate of heat conduction through the container wall is")