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diff --git a/1808/CH1/EX1.9/Chapter1_Example9.sce b/1808/CH1/EX1.9/Chapter1_Example9.sce
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+clc
+clear
+//INPUT DATA
+pmi=7;//mean effective pressure in bar
+L=0.45;//stroke in m
+nc=1;//number of cylinders
+N=80;//speed in rpm
+n=1;//for 2 stroke
+nm=80;//Mechanical efficiency in percentage
+
+//CALCULATIONS
+IP=(pmi*100*L*(3.14*(0.3^2)/4)*N*nc)/(60*n);//indicated power in kW
+BP=(nm*IP)/100;//Brake power in kW
+FP=IP-BP;//Frictional power in kW
+
+//OUTPUT
+printf('(i)Indicated power is %3.2f kW \n (ii)brake power is %3.2f kW \n(iii)frictional power is %3.2f kW ',IP,BP,FP)