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diff --git a/3685/CH20/EX20.8/Ex20_8.sce b/3685/CH20/EX20.8/Ex20_8.sce
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+clc
+// Given that
+Bp = 14.7 // Brake power when all cylinder operating in kW
+Bp1 = 10.14 // Brake power with cylinder no. 1 cut out in kW
+Bp2 = 10.3 // Brake power with cylinder no. 2 cut out in kW
+Bp3 = 10.36 // Brake power with cylinder no. 3 cut out in kW
+Bp4 = 10.21 // Brake power with cylinder no. 4 cut out in kW
+m_f = 5.5 // Fuel consumption in kg/h
+cv = 42 // Calorific value MJ/kg
+d = 8 // Diameter of cylinder in cm
+L = 10 // Stroke of cylinder in cm
+Vc = 0.1 // Clearance volume in litre
+printf("\n Example 20.8\n")
+Ip1 = Bp-Bp1
+Ip2 = Bp-Bp2
+Ip3 = Bp-Bp3
+Ip4 = Bp-Bp4
+Ip = Ip1+Ip2+Ip3+Ip4
+n_m = Bp/Ip
+Vs = (%pi/4)*((d*(10^-2))^2)*(L*(10^-2))
+r_k = (Vs+(Vc*(10^-3)))/(Vc*(10^-3))
+n_ase = 1- (1/(r_k^(1.4-1)))
+n_th = Ip*3600/(m_f*cv*1000)
+R_e = n_th/n_ase
+printf("\n Mechanical efficiency = %f percent,\n Relative efficiency on indicated power basis = %f percent",n_m*100,R_e*100)
+//The value of  answer is different because of round off error
+
+
+