Question

How much does James have to pay for a vaccum cleaner that he uses for 4 hours a week.  In James's neighborhood, the cost of electricity is 27 cents per kwhr.The power is P = 800 W

Answer 1

Given:

The power of the vacuum cleaner is P = 800 W = 0.8 kW

The time consumption is t = 4 hours a week.

The cost of electricity is 27 cents per kWh

To find the cost of the electricity for using the vacuum cleaner for a week.

Step-by-step explanation:

First, we need to find the energy.

The energy can be calculated as

`\begin{gathered} E=P* t \\ =0.8*4 \\ =3.2\text{ kWh} \end{gathered}`

The cost of electricity per week due to vacuum cleaner will be

`27*3.2=86.4\text{ cents}`

Final Answer: The cost of electricity James has to pay for a vacuum cleaner for using it 4 hours a week is 86.4 cents.