A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?
Answer Details
To calculate the energy consumption of an appliance, you can use the formula:
Energy (in KWh) = Power (in kW) × Time (in hours)
First, convert the power rating of the refrigerator from watts (W) to kilowatts (kW). Since 1 kW is equal to 1000 W, you can convert 150W to kilowatts by dividing by 1000:
150 W = 0.150 kW
Next, calculate the energy consumed over the period the refrigerator is kept on, which is 336 hours. Use the formula:
Energy = 0.150 kW × 336 hours
Now, perform the multiplication:
Energy = 50.40 kWh
Therefore, when the refrigerator is kept on for 336 hours non-stop, it consumes 50.40 kWh of energy. This is the correct choice.