contestada

How much does it cost to run eight 60 W light bulbs, operating for an average of 6.4 hours per day for a 30 day month?

Respuesta :

We will have the following:

[tex]\frac{60W}{6.4h}=\frac{75}{8}W/h[/tex]

Then:

[tex]30\cdot\frac{75}{8}W/h=\frac{1125}{4}\cdot\frac{W}{h}\cdot\frac{kW}{1000W}=\frac{9}{32}kW/h[/tex]

Now that we have calculated the amount of kWh consumed that month we simply multiply by the cost of consumption of kWh, that is:

[tex]\text{Cost of total consumption}=\frac{9}{32}kW/h\cdot\text{cost of each kW/h}[/tex]

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