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+// Example 34_4
+clc;funcprot(0);
+//Given data
+PC=30;// Plant capacity in MW
+F_l=0.4;// Load factor 
+Cc=650;// Caoal costs in Rupees
+t=24;// hours
+n_o=25;// Over all efficiency in %
+CV=25000;// kJ/kg
+
+//Calculation
+E_g=PC*F_l*24;// Energy generated in the form of electricity per day in kWh
+E_i=E_g/(n_o/100);// Input energy per day in kWh
+E_i=E_i*10^3*3600;// kJ
+m_f=E_i/CV;// Mass of fuel consumed per day in kg/day
+m_f=m_f/1000;// tonnes/day
+Cc_d=Cc*m_f;// Cost of coal/day in rupees
+printf('\nCost of coal/day=Rs.%0.0f',Cc_d);
+// The answer provided in the textbook is wrong