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diff --git a/3511/CH9/EX9.9/Ex9_9.sce b/3511/CH9/EX9.9/Ex9_9.sce
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index 000000000..eaf44d850
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+++ b/3511/CH9/EX9.9/Ex9_9.sce
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+clc;
+rp=1.35; // Actual pressure ratio
+DelT_rise=30; // Actual temperature rise in K
+beta_1=47; // Inlet blade angle in degree
+beta_2=15; // Outlet blade angle in degree
+u=225; // Peripheral velocity in m/s
+ca=180; // Axial velocity in m/s
+T01=27+273; // Ambient temperature in kelvin
+Cp=1.005; // Specific heat in KJ/kg K
+r=1.4; // Specific heat ratio
+R=287; // Characteristic gas constant in J/kg K
+
+eff_s=(rp^((r-1)/r)-1)*T01/DelT_rise;
+wf=(DelT_rise*Cp*10^3)/(u*ca*(tand(beta_1)-tand(beta_2)));
+
+disp ("%",eff_s*100,"Stage Efficiency = ");
+disp (wf,"Work done factor = ");