If electric energy costs 10 cents per kilowatt-hour,how many cents does it cost to keep a 660-W toaster in steady operation for 30 min?

Question

Quizplus · Accepted Answer

First, convert the power of the toaster to kilowatts: 660 W = 0.66 kW. Then, calculate the energy used in 30 minutes (0.5 hours): 0.66 kW * 0.5 hours = 0.33 kWh. Finally, multiply by the cost per kWh: 0.33 kWh * 10 cents/kWh = 3.3 cents.

If Electric Energy Costs 10 Cents Per Kilowatt-Hour,how Many Cents