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diff --git a/1073/CH3/EX3.3/3_3.sce b/1073/CH3/EX3.3/3_3.sce
new file mode 100755
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+++ b/1073/CH3/EX3.3/3_3.sce
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+clc;
+clear;
+//Example 3.3
+//Given
+mu=15*10^-6    //Kinematic viscosity in [sq m /s]
+x=0.4    //[m]
+u_inf=3    //[m/s]
+//At x=0.4 m,
+Nre_x=u_inf*x/mu    ;
+printf("Since Nre,x (%f)is Less than 3*10^5,..the boundary layer is laminar",Nre_x);
+del=4.64*x/sqrt(Nre_x)    //[m]
+del=del*1000    //[mm]
+printf("\nThickness of boundary layer at x=%f m =%f mm\n",x,del);
+Cf_x=0.664/sqrt(Nre_x);
+printf("Local skin friction coefficient is :%f",Cf_x);
+