Andy works 8 hours and leaves a certain radio on all day. This radio requires 150 watts of electricity. At a price per kilowatt-hour of $0.10, how much will it cost to run the radio for his 8-hour work day?

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WaywardDelaney WaywardDelaney · Answer 1 · 2019-12-19T07:51:34+01:00

Answer:

The cost to run the radio for 8 hours work day is $0.12

Step-by-step explanation:

Given as :

The working hour of Andy = 8 hours

The power consumption of radio = 150 watts

The price per kilowatt-hour = $0.10

Let The cost to run the radio for 8 hours = $x

Now, According to question

The energy rating of radio = power consumption × number of working hours

So,

The energy rating of radio = 150 watts × 8 hours

Or, The energy rating of radio = 1200 watts-hour

∵ 1000 watts = 1 kilo-watt

So, 1200 watts = [tex]\frac{1200}{1000}[/tex] kilo-watt

Or, 1200 watts = 1.2 kilo-watt

∴ The energy rating of radio = 1.2 kilo watts-hour

Now, since The price for energy of 1 kilo-watt hour = $0.10

∴ The price for energy of 1.2 kilo-watt hour = $0.10 × 1.2

Or, The price for energy of 1.2 kilo-watt hour = $0.12

Hence The cost to run the radio for 8 hours work day is $0.12 Answer