A 2 kW heater runs for 3 hours. Electricity costs 0.30 euros per kWh. What is the cost?
Answer and explanation
Correct answer: D. 1.80 euros
- Step 1: Energy = 2 kW x 3 h = 6 kWh. Step 2. 6 x 0.30 = 1.80 euros. Answer: 1.80 euros. Why not the others: these use the wrong energy or price.
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