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diff --git a/1379/CH6/EX6.1.2/example6_2.sce b/1379/CH6/EX6.1.2/example6_2.sce
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+
+//example 6.2
+clc; funcprot(0);
+//exapple 6.2 
+// Initialization of Variable
+Q1=24.8/1000;//flow in pump 1
+d1=11.8/100;//diameter of impeller 1
+H1=14.7//head of pump 1
+N1=1450//frequency of motor 1
+Q2=48/1000//flow in pump 2
+//calculation
+H2=1.15*H1;//head of pump 2
+specific_speed=N1*Q1^0.5/H1^0.75;
+N2=specific_speed*H2^0.75/Q2^0.5;//frequency of motor 2
+disp(N2 ,"frequency of motor 2 in rpm");
+d2=sqrt(N2^2*H1/H2/N1^2/d1^2);
+disp(1/d2 , "diametr of impeller 2 (in m)");
+