How much does it cost to operate a 80-W lamp continuously for a week if the...

Question

Question

How much does it cost to operate a 80-W lamp continuously for a week if the power utility rate is 25 cents/kWh.

Answer 1

Answer #1

No of units = wattage x hours of usage x days / 1000

= 80 x 24 x 7 / 1000

=13.44 KWh

total cost = No. of units x utility rate

= 13.44 x 25 = 336 cents

Answer 2

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