An alternative to CFL bulbs and incandescent bulbs are light-emitting diode (LED) bulbs. A 60 W incandescent bulb can be replaced by a 12 W

Question

An alternative to CFL bulbs and incandescent bulbs are light-emitting diode (LED) bulbs. A 60 W incandescent bulb can be replaced by a 12 W LED bulb. Both produce 800 lumens of light. Assuming the cost of electricity is $0.29 per kilowatt-hour, how much does it cost (in dollars) to run the LED bulb for one year if it runs for four hours a day?

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RI SƠ 3 years 2021-08-24T14:31:37+00:00 1 Answers 4 views 0

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  1. phucdien
    0
    2021-08-24T14:33:08+00:00
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    Answer:

    C = $5.08

    it costs $5.08 to run the LED bulb for one year if it runs for four hours a day

    Explanation:

    Given;

    Power of Led bulb P = 12 W

    Rate r = $0.29 per kilowatt-hour

    Time = 4 hours per day

    The number of hours used in a year is;

    time t = 4 hours per day × 365 days per year

    t = 1460 hours

    The energy consumption of Led bulb in a year is;

    E = Pt

    E = 12 W × 1460 hours

    E = 17520 watts hour

    E = 17.52 kilowatt-hour

    The cost of the energy consumption is;

    C = E × rate = Er

    C = 17.52 × $0.29

    C = $5.08

    it costs $5.08 to run the LED bulb for one year if it runs for four hours a day

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