Sara is charged a total of $30.80 for electricity in the 30 days of November. Calculate the number of units of electricity she used​

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Answers 1

Step-by-step explanation:

Energy=E=Pt where P=power and t=time

Total energy consumed=E=(60W×5h+100W×3h+1000W×2h)×30

⟹E=(300+300+2000)×30Wh

⟹E=78000Wh=78kWh

We know that 1unit=1kWh

⟹E=78units

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