Respuesta :

nkirotedoreen46

Answer:

16.9 cents

Step-by-step explanation:

We are given the following information;

  • Charge per kWh is 13 cents
  • A bulb of a 100 Watt
  • Number of hours in use 13 hours a day

Required to determine the daily cost of operating the bulb;

First, we will need to calculate the number kilowatts

Note: 1 kW = 1000 W

Power needed = (100 watt × 13 hours) ÷ 1000

                         = 1.3 kWh

But;

1 kWh = 13 cents

Therefore;

Cost = 1.3 kWh × 13 cents per kWh

        = 16.9 cents

Thus; the daily cost of operating the bulb is 16.9 cents

Otras preguntas