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How much money would be saved by turning off one 100.0-W lightbulb 3.0 h/day for 365 days if the

cost of electricity is
$0.12 per kWh?

1 Answer

5 votes

Answer:

the money that would be saved is $13.14.

Step-by-step explanation:

Given;

power consumed by the light bulb, P = 100 W = 0.1 kW

time of running the bulb, t = 3 hours for 365 days = 1,095 hours

cost rate of power consumption, C = $0.12 per kWh

Energy consumed by the light bulb for the given days;

E = Pt

E = 0.1 kW x 1,095 hr

E = 109.5 kWh

Cost of energy consumed = 109.5 kWh x $0.12 / kWh

= $13.14

Therefore, the money that would be saved is $13.14.

User Hshib
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