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12 March, 18:44

In a household, a business is run for an average of 6 hours per day. The total power consumed by a computer and its printer is 245 watts. In addition, a 55-W light bulb runs during the same 6 hours. If their utility charges 11.75 cents per kWh, how much do the owners pay every 30-days?

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  1. 12 March, 21:02
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    The owners pay $ 6.34 OR $ 6 and 34 cents, every 30-days.

    Explanation:

    First, we calculate the energy consumption per day:

    Energy Consumed per day = (245 W + 55 W) (6 hr/day) (1 KW/1000 W)

    Energy Consumed per day = 1.8 KWh/day

    Now, we calculate total energy consumed in 30 days:

    Total Energy Consumed in 30 Days = E = (1.8 KWh/day) (30 days)

    E = 54 KWh

    Now, we calculate the cost:

    Cost = (E) (Unit Cost)

    Cost = (54 KWh) (11.75 cents/Kwh)

    Cost = (634.5 cents) ($ 1 / 100 cents)

    Cost = $ 6.34 = $ 6 and 34 cents
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