A device consume 180000000 joule of energy in a month . if the cost of electricity per unit is 3.5 rs then what is the cost of operating this device monthly?
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Energy consumed in a month = 180000000J
= 180000KJ
= 50 kWh or 50units
Cost of 1 unit of electrical energy = Rs. 3.5
Total cost of 50 units = 50 × Rs. 3.5
= Rs. 175
Therefore,
cost of operating this device monthly is Rs. 175
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