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27 May, 14:45

Find the number of kilowatt-hours of energy used when a 110-watt light bulb burns for 215 hours.

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  1. 27 May, 15:09
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    We determine the kilowatt-hour by multiplying the energy in kilowatt and the time in hours. We do as follows:

    kWh = 110 W (1 kW / 1000 W) (215 hrs)

    kWh = 23.65 kWh

    Hope this answers the question. Have a nice day.
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