an electric heater 1200w operates 2hr per day . find the cost of energy required to operate it for 30days at 5rs per unit.
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1200W=1.2KW
Time for which the heater works a day =1.2*2
Time in 30 days =1.2*2*30=72
Therefore cost =72*5=Rs.360
Time for which the heater works a day =1.2*2
Time in 30 days =1.2*2*30=72
Therefore cost =72*5=Rs.360
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