Question

A typical home uses a total of seven kilowatts of electricity for each kilowatt of electricity used by the refrigerator. How much of a $70 electric bill is due to using the refrigerator, assuming that every kilowatt costs the same amount?

Answer 1

10 kilowatts of electricity was used by the refrigerator.

Given the following data:

• Total energy consumption = 7 kW

• Total cost of electricity = $70

To find how much of a $70 electric bill is due to using the refrigerator:

Mathematically, energy is given by the formula:

$Energy = power$ × $time$

However, we are required to find the amount of energy consumption for a $70 electric bill and as such we would simply divide the given variables as follows:

$Energy = \frac{70}{7}$

Energy = 10 kW

Therefore, 10 kilowatts of electricity was used by the refrigerator.

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