Question

If electricity costs $0.12 per kWh, then what is the total cost for a family of four to illuminate ten 60 watt bulbs each for 30 days? (Round to the nearest dollar)

Answer 1

207$

Step-by-step explanation:

60x10=600 watts x 4 = 2400 watts x 720 hours = 1 728 000 Watt hours / 1000 = 1728 kWh x $ .12 = 2017.36

30 days = 720 hours

Answer 2

$52

Step-by-step explanation:

The following were obtained from the question:

Power for ten 60watts = 10 x 60 = 600watt = 600/1000 = 0.6Kw

Time = 30days = 30 x 24 = 720hrs

Energy consumed =?

Energy consumed = power x time

Energy consumed = 0.6 x 720 = 432Kwh

The cost of operating 1kwh = $0.12

Therefore, the cost of operating 432Kwh = 432 x 0.12 = $52