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+clc
+//Chapter1
+//Ex_1.11
+//Given
+//from fig 7.1
+//at 210 degree celcius
+disp("At 210 degree celcius")
+C_L=50 //CL=50% Sn
+C_alpha=18 //C_alpha=18% Sn
+Co=40 // solidification of alloy
+//lever rule
+W_alpha=(C_L-Co)/(C_L-C_alpha)
+disp(W_alpha*100,"weight fraction of alpha in the alloy is")
+W_L=1-W_alpha
+disp(W_L*100,"weight fraction of liquid phase in the alloy is")
+//at 183.5 degree celcius
+disp("At 183.5 degree celcius")
+C_L=61.9 //CL=50% Sn
+C_alpha=19.2 //C_alpha=18% Sn
+Co=40 // solidification of alloy
+//lever rule
+W_alpha=(C_L-Co)/(C_L-C_alpha)
+disp(W_alpha*100,"weight fraction of alpha in the alloy is")
+W_L=1-W_alpha
+disp(W_L*100,"weight fraction of liquid phase in the alloy is")
+//at 182.5 degree celcius
+disp("At 182.5 degree celcius")
+C_beta=97.5 //CL=50% Sn
+C_alpha=19.2 //C_alpha=18% Sn
+Co=40 // solidification of alloy
+//lever rule
+W_alpha=(C_beta-Co)/(C_beta-C_alpha)
+disp(W_alpha*100,"weight fraction of alpha in the alloy is")
+W_beta=1-W_alpha
+disp(W_beta*100,"weight fraction of beta phase in the alloy is")