Question

A refrigerator of 500 watts is used for 12 hours every day. How much kilowatt-hour energy is consumed by the refrigerator for 30 days?

Hint:

Kilowatt-hour (kWh) is the unit of electrical energy used in electricity bills. 1 kWh = 1 unit of electricity.

Answer 1

Given data:
Power of refrigerator, \( P = 500 \) W = 0.5 kW
Time used per day, \( t = 12 \) hours
Total days, \( d = 30 \)
Energy Consumption: \[ \text{Energy} = P \times t \times d \] \[ = 0.5 \times 12 \times 30 \] \[ = 180 \text{ kWh} \] Thus, the refrigerator consumes 180 kWh in 30 days.