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A washing machine uses 1.8 × 105 watts of power. If it is in use for 2 hours per day (on average), how many kilowatt hours will it use in 30 days?

1.1 × 104 kilowatt hours
36 kilowatt hours
18 kilowatt hours
540 kilowatt hours
1.1 × 106 kilowatt hours

Respuesta :

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Answer:

Option A

1.1 × 104 kilowatt hours

Explanation:

Consumption in Kwh is given by multiplying hourly consumption by the number of hours worked, in this case 2 hours. Assuming that in all the 30 days the daily consumption is constant then we shall get Kwh as [tex]\frac {1.8\times 10^{5}\times 2 h\times 30days}{1000}=10,800 kwh=1.08\times 10^{4}\approx 1.1\times 10^{4} Kwh[/tex]

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