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An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?

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An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?
A. Rs 12
B. Rs 24
C. Rs 36
D. Rs 48
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Correct Answer - B
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