problem on economics of power generation - tariff method - hopkinson demand rate

#hopkinson_demand_rate #tariff_method #rakesh_valasa
Q) A Hopkinson demand rate is quoted as follows:
Demand rates:
A Hopkinson demand rate is quoted as follows:
Demand rates:
First 1 kW of maximum demand = ₹6/kW/month
Next 4 kW of maximum demand = ₹5/kW/month
Excess 5 kW of maximum demand = ₹4/kW/month
Energy rates:
First 50 kWh = 7 paise/kWh
Next 50 kWh = 5 paise/kWh
Next 200 kWh = 4 paise/kWh
Next 400 kWh = 3 paise/kWh
Excess over 700 kWh = 2 paise/kWh.
Determine
(i) The monthly bill for a total consumption of 2000kWh and a maximum demand of 15 kW. Also find out the unit energy cost.
(ii) Lowest possible bill for a month and a corresponding unit energy cost.