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+// Chapter 4 Exapmle 5//
+clc
+clear
+// load factor of consumer=lf,monthly consumption=mc,maximum demand=md//
+lf=0.35;
+mc=504;// in kWh//
+md=mc/(lf*24*30);
+printf("\n Maximum Demand = %.2f kW\n",md);
+// rate of electricity per maximum demand=r1,per kWh=r2,tc=total cost per kWh//
+r1=180;// in Rs//
+r2=2;
+r=(r1*md)+(r2*mc);
+tc=r/mc;
+printf("\n Overall cost per kWh = %.2f rupees\n",tc);
+// consumption increased by 20%,so new consumption=mc1 //
+mc1=mc*1.20;
+lf1=lf;// load factor remains the same//
+md1=mc1/(lf*24*30);
+r=(r1*md1)+(r2*mc1);
+tc1=r/mc1;
+printf("\n Overall cost per kWh with consumption increasing by 20 percent = %.2f rupees\n",tc1);
+// load factor increased to 40%,so new maximum demand=md2//
+lf2=0.40;
+mc2=mc;
+md2=mc/(lf2*24*30);
+r=(r1*md2)+(r2*mc2);
+tc2=r/mc2;
+printf("\n Overall cost per kWh if power factor increases to 40 percent= %.2f rupees\n",tc2);