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Power

In a city, el...

Question

In a city, electricity costs $0.12 per kilowatt-hour. A bulb of 150-watt operates for 5 hours. Calculate the cost of electricity which is consumed by the bulb.

A

$0.009

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B

$0.09

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C

$0.90

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D

$9.00

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E

$90.00

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Solution

The correct option is B $0.09 C o s t$ =(0.150 kWh) (hr) \left ( 12 \dfrac {cent}{kWh} \right )= 9 cent
= $0.09$

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