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diff --git a/581/CH3/EX3.3/Example3_3.sci b/581/CH3/EX3.3/Example3_3.sci
new file mode 100755
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+++ b/581/CH3/EX3.3/Example3_3.sci
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+
+clear;
+clc;
+
+printf("\t Example 3.3\n");
+
+T1=293; // Entering Temperature of Water, K
+T2=313; //Exit Temperature of water, K
+m=25/60;//Condensation rate of steam, kg/s
+T3=333; // Condensation Temperature,K
+A=12; //area of exchanger, m^2
+h=2358.7*10^3; //latent heat, J/kg
+
+U=(m*h)/(A*((T2-T1)/log((T3-T1)/(T3-T2))))+0.6;
+printf("\t Overall heat transfer coefficient is : %.0f W/(m^2*K)\n",U);
+
+Mh=(m*h)/(4174*(T2-T1));
+printf("\t required flow of water is : %.2f kg/s\n",Mh);
+//End
+\ No newline at end of file