Answer:
It costs 9.6 cents
Explanation:
In this question, we are asked to calculate the amount it cost to operate a coffee pot for a certain number of hours given the amount of current it draws and the voltage line on which it runs.
We proceed as follows.
Firstly, we calculate the amount of power consumed by the coffee pot.
Mathematically, the power consumed by the Coffee pot = current * voltage = I * V
From the question, we can identify that the current drawn is 4A with the voltage line equal to 120V.
The amount of power is thus; 4 * 120 = 480W (w = watts)
Now, the metric used in payment is in kilowatt hour. This means we have to convert whatever value of power we have to the appropriate unit. This can be done by multiplying the power by the time and also converting to kilowatt.
Firstly, we convert to Kilowatt. This can be done by dividing the watts by 1000 = 480/1000 = 0.48
Now we convert this to Kilowatt hour = 0.48 * 2 = 0.96 Kilowatt hour
Now as stated in the question, the energy cost is 10 cents per KWh. This means the amount to pay Would be 0.96 * 10 = 9.6 cents
