Cost of coal is 5 per kg and can produce energy of 20 MJ kg...

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Cost of coal is 5 per kg and can produce energy of 20 MJ kg If a power station uses coal to produce electricity with 25 efficiency then the cost of coa for producing 1 unit 1 kw h of electricity in kw h R 3 6x166J 0 9 2 3 6 3 9 0 4 36 0 20x106 5 31 x5 3 6 S

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