An electric stove with four burners and an oven is used in...

An electric stove with four burners and an oven is used in preparing a meal as follows. Burner 1: 20 minutes $\quad$ Burner 2: 40 minutes Burner 3: 15 minutes Burner 4: 45 minutes Oven: 30 minutes If each burner is rated at $1.2 \mathrm{kW}$ and the oven at $1.8 \mathrm{kW},$ and electricity costs 12 cents per $\mathrm{kWh}$ calculate the cost of electricity used in preparing the meal.

An electric stove with four burners and an oven is used in preparing a meal as follows.
Burner 1: 20 minutes $\quad$ Burner 2: 40 minutes
Burner 3: 15 minutes Burner 4: 45 minutes
Oven: 30 minutes If each burner is rated at $1.2 \mathrm{kW}$ and the oven at $1.8 \mathrm{kW},$ and electricity costs 12 cents per $\mathrm{kWh}$ calculate the cost of electricity used in preparing the meal.

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Key Concepts

Electrical Power Rating

Every electrical appliance has a power rating, typically stated in kilowatts (kW) or watts (W). This rating identifies how much energy the appliance uses per unit time. Knowing the power rating is essential when calculating the total energy consumption and, consequently, the costs associated with its use.

Time Conversion

Time must often be converted into compatible units for energy calculations, such as converting minutes into hours. This conversion is necessary since energy consumption is usually measured in kilowatt-hours (kWh), which combines power (in kW) and time (in hours).

Energy Consumption Calculation

The energy used by an appliance is determined by multiplying its power rating (in kW) by the time it is in operation (in hours). This product, measured in kilowatt-hours (kWh), represents the total energy consumed during the appliance's usage.

Cost Calculation

Once the total energy consumption in kWh is determined, calculating the cost involves multiplying the energy consumed by the cost per unit of energy, typically given as a rate per kilowatt-hour. This step provides the final electricity cost for the usage over a specified period.

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