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diff --git a/542/CH11/EX11.16/Example_11_16.sce b/542/CH11/EX11.16/Example_11_16.sce
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+//Example 11.16
+
+clear;
+clc;
+
+printf("\tExample 11.16\n");
+
+//Mole fractions
+xf=[0.40 0.35 0.25];
+xd=[0.534 0.453 0.013];
+xw=[0 0.04 0.96];
+
+//Amount of feed, product, bottom in kmol
+F=[40 35 25];
+D=[40 34 1];
+W=[0 1 24];
+
+//roots of equation
+theta=[1.15 1.17];
+
+//relative volatility
+alpha=[2.7 2.22 1];
+
+//Underwoods 1st equation for q=1
+sums=[0 0];
+for i=1:2
+    for j=1:3
+        sums(i)=sums(i)+(alpha(j)*xf(j)/(alpha(j)-theta(i)));
+    end
+end
+printf("\nFrom Underwoods 1st eq\n");
+printf("The value of 1-q at theta = 1.15 and 1.17 are");
+disp(sums);
+
+//Underwoods 2nd equation for minimum reflux ratio
+sum2=0;
+for l=1:3
+    sum2=sum2+(alpha(l)*xd(l)/(alpha(l)-theta(2)));
+end
+
+Rm=sum2-1;
+printf("\nMinimum Reflux ratio is %.3f\n",Rm);
+
+//End
+\ No newline at end of file