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+//CHAPTER 4- MEASURING INSTRUMENTS
+//Example 9
+
+disp("CHAPTER 4");
+disp("EXAMPLE 9");
+
+//VARIABLE INITIALIZATION
+I=50;                     //in Amperes
+v=230;                    //in Volts
+rev=61;                   //revolutions
+t=37/3600;                //from seconds to hours
+m_c=500;                  //meter constant in rev/kwh
+pow_fact=1;               //since load is purely resistive
+
+//SOLUTION
+E1=(v*I*t*pow_fact)/1000; //energy consumed in 37 seconds in kWh
+E2=rev/m_c;               //energy consumption registered by meter
+err=(E2-E1)/E1;
+err=err*100;              //percentage error
+disp(sprintf("The percentage error is %.2f %%",err));
+if(err<0) then
+disp("The negative sign indicates that the meter will run slow");
+end
+
+//END
+
+
+