Problem 3 : 1. A steam power station has an overall efficiency of 25% and 0·5 kg of coal is burnt per kWh of electrical energy generated. Calculate the calorific value of fuel. Heat equivalent of 1 kWh is 860 k calories. 2. A hydro-electric generating station is supplied from a reservoir of capacity 5*10^7 cubic metres at a head of 250 metres. Find the total energy available in kWh if the overall efficiency is 70%.

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Problem 3 : 1. A steam power station has an overall efficiency of 25% and 0·5 kg of coal is burnt per kWh of electrical energy generated. Calculate the calorific value of fuel. Heat equivalent of 1 kWh is 860 k calories. 2. A hydro-electric generating station is supplied from a reservoir of capacity 5*10^7 cubic metres at a head of 250 metres. Find the total energy available in kWh if the overall efficiency is 70%.
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