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diff --git a/680/CH8/EX8.11/8_11.sce b/680/CH8/EX8.11/8_11.sce
new file mode 100755
index 000000000..4b1a69833
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+++ b/680/CH8/EX8.11/8_11.sce
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+//Problem 8.11:
+
+//initializing the variables:
+Ts = 90; // in deg F
+Cp = 1; // in Btu/lb.deg F
+Cpv = 1030; // in Btu/lb
+Tr = 115; // in deg F
+D1 = 12000000; // in Btu/h
+D2 = 6000000; // in Btu/h
+D3 = 23000000; // in Btu/h
+D4 = 17000000; // in Btu/h
+D5 = 31500000; // in Btu/h
+d = 8.32; // in lb/gal
+
+//calculation:
+Qdt = D1 + D2 + D3 + D4 + D5
+F = Qdt/((Tr - Ts)*Cp)
+Fgpm = F/(60*d)
+
+printf("\n\nResult\n\n")
+printf("\n total flowrate of cooling water is %.0f gal/min",Fgpm)
+\ No newline at end of file