lee watches tv for 3 hours per day. during that time, the tv consumes 150 watts per hour. electricity costs…

lee watches tv for 3 hours per day. during that time, the tv consumes 150 watts per hour. electricity costs (18 cents)/(1 kilowatt-hour). how much does lees tv cost to operate for a month of 30 days? ex: 12 cents

lee watches tv for 3 hours per day. during that time, the tv consumes 150 watts per hour. electricity costs (18 cents)/(1 kilowatt-hour). how much does lees tv cost to operate for a month of 30 days? ex: 12 cents

Answer

Explanation:

Step1: Calculate the total watt - hours per day

The TV consumes 150 watts per hour and is used for 3 hours per day. So the watt - hours per day (W_d=150\times3 = 450) watt - hours.

Step2: Calculate the total watt - hours per month

Since there are 30 days in a month, the total watt - hours per month (W_m=450\times30=13500) watt - hours.

Step3: Convert watt - hours to kilowatt - hours

We know that 1 kilowatt - hour = 1000 watt - hours. So the total kilowatt - hours (k=\frac{13500}{1000}=13.5) kilowatt - hours.

Step4: Calculate the cost

The cost of electricity is 18 cents per kilowatt - hour. So the total cost (C = 18\times13.5=243) cents.

Answer:

243 cents