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diff --git a/1808/CH1/EX1.12/Chapter1_Example12.sce b/1808/CH1/EX1.12/Chapter1_Example12.sce
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+clc
+clear
+//INPUT DATA
+Vc=0.009;//clearance volume in m^3
+d=0.3;//bore in m
+L=0.5;//stroke in m
+g=1.4;//constant
+cv=20000;//calorific value in kJ/m^3
+pmi=800;//mean effective pressure in bar
+N=120;//explosions per minute
+nc=1;//number of cylinders
+n=1;//for single cylinder
+mf=30;//mass fuel consumption 
+
+
+//CALCULATIONS
+Vs=(3.14*d^2*L/4);//swept volume in m^3
+Rc=((Vs+Vc)/Vc);//compression ratio
+IP=(pmi*L*(3.14*(d^2)/4)*N*nc)/(60*n);//Indicated power in kW
+nit=(IP/(mf*cv/3600))*100;//Indicated thermal efficiency in percentage
+no=(1-(1/(Rc^(g-1))))*100;//Air standard efficiency in percentage
+nr=(nit/no)*100;//relative efficiency in percentage
+
+
+//OUTPUT
+printf('(i)Compression ratio is %3.3f \n (ii)Indicated thermal efficiency is %3.2f percentage \n (iii)Air standard efficiency is %3.2f percentage \n (iv)Relative efficiency is %3.2f percentage',Rc,nit,no,nr)
+