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diff --git a/1445/CH4/EX4.7/ch4_ex_7.sce b/1445/CH4/EX4.7/ch4_ex_7.sce
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+//CHAPTER 4- MEASURING INSTRUMENTS
+//Example 7
+
+disp("CHAPTER 4");
+disp("EXAMPLE 7");
+
+//VARIABLE INITIALIZATION
+m_c=100;                //meter constant in rev/kwh               
+I=20;                   //in Amperes
+v=210;                  //in Volts
+pow_fact=0.8;           //leading
+rev_act=350;            //actual revolution
+
+//SOLUTION
+E=(v*I*pow_fact)/1000;  //from Wh to kWh
+rev_true=m_c*E;
+disp(sprintf("The number of revolutions made by the meter is %f",rev_true));
+err=(rev_act-rev_true)/rev_true;
+err=err*100;             //percentage error
+disp(sprintf("The percentage error is %f %%",err));
+if(err<0) then
+disp("The negative sign indicates that the meter will run slow");
+end
+
+//END
+
+