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diff --git a/431/CH2/EX2.27/EX2_27.sce b/431/CH2/EX2.27/EX2_27.sce
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+//Calculating the efficiency of motor
+//Chapter 2
+//Example 2.27
+//page 128
+clear;
+clc;
+disp("Example 2.27")
+N=960;...........................//speed in rpm
+F=23;............................//effictive load in kgf
+r=45/2;...............................//radius of the drum
+printf("radius of the drum=%fcm",r)
+pi=3.14;
+OP=(2*pi*N*F*r*9.81)/(60*100);
+printf("\noutput power=%fW",OP)
+Vi=230;..................//motor input in volts
+Ci=28;.......................//input current in amperes
+IP=(Vi*Ci);
+printf("\ninput power =%fW",IP)
+Effi=(OP/IP)*100;
+printf("\nEfficiency of the motor=%fpercent",Effi)
+\ No newline at end of file