Lee watches TV for 2 hours per day. During that time, the TV consumes 250 watts per hour. Electricity costs (10 cents)/(1 kilowatt-hour). How much does Lee's TV cost to operate for a month of 30 days?

The total cost to operate Lee's TV for a month of 30 days is 150 cents and this can be determined by using the given data.

Given :

The following steps can be used in order to determine the total cost to operate Lee's TV for a month of 30 days:

Step 1 - The arithmetic operations can be used in order to determine the total cost to operate Lee's TV for a month of 30 days.

Step 2 - According to the given data, Lee watches TV for 2 hours per day. So, the total consumption of electricity in one day is 500 watts.

Step 3 - So, the total consumption of electricity in 30 days is 15000 watts.

Step 4 - According to the given data, 1 kilowatt cost 10 cents. So, let the cost of the 15 kilowatts be 'x'.

Step 5 - So, the value of 'x' can be calculated as:

So, the total cost to operate Lee's TV for a month of 30 days is 150 cents.

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$1.5

Step-by-step explanation:

Lets us first calculate energy consumed by TV in 30 days.

Energy consumed by TV in one hour : 250 watts.

TV operated 2 hours a day

so energy consumer by TV in a day = 250 * 2 watts = 500 watts hour

Energy consumed by TV in 30 day = energy consumer by TV in a day * 30

         = 500*30 watts = 15,000 watt-hour

Convert total energy consumed in kilo watt hour  

we know that one kilowatt hour = 1000 watt-hour

Thus, 15,000 watt-hour = 15,000/1000 kilowatt-hour = 15 kilowatt-hour

cost of electricity = 10 cents per   kilowatt-hour

cost of electricity for 15 kilowatt-hour = 15* cost of electricity for one  kilowatt-hour( which is 10 cents)

=>15*10 = 150 cents

As $1 = 100 cents

hence 150 cents = $150/100 = $1.5 .

Thus, it cost $1.5 to to operate for a month of 30 days.

true !

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