Calculate the cost of operating a heater of 500 W for 20 hours at the rate of ₹ 3.90 per unit.
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Answer:
cost of electricity wiil be 39 ₹
Explanation:
cost of electricity = watt ×time in hours×cost of unit / 1000
cost of electricity = 500×20×3.90/1000
cost of electricity =39 ₹
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