Thread: heat transfer from triangular fins

Problem: Consider an aluminium alloy fin(k=180w/m-k) of triangular cross section with length l=5cm,base thickness b=1cm,and very large width w.The base of fin maintained at the temperature of T0=200 degrees centigrade. The fin is losing heat to the surrounding medium at T infinity=25 degrees with heat transfr coefficient of h=15 w/m^2-k. using the finite difference method withsix equally spaced nodes along the fin in X-direction,determine (a) the temperatures at the nodes,(b) the rate of heat transfer from the fin for w=1 meter and (c) the fin efficiency

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Q' fin= h((w*delta x)/cos teta )*((T0+2(T1+T2+T3+T4)+T5-10*Ta))
Where h=15; w=1; delta x=0.01; teta=5.71 degrees;
Since T0=200;
T1=198.6;
T2=197.1;
T3=195.7;
T4=194.3;
T5=192 .9
Ta=25;
And the Q'fin =258.4
I need c program of above equation