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 Homework Statement:

Show that the cost of this wasted energy will be about £4, if electrical energy is
charged at 20 p per kWh. given that total energy wasted energy is 7.5(6) × 107 (J)
 Relevant Equations:
 no equations
as it wants the units kWh does that not mean you times by 3600 to go from s > h and to go from W to kilowatt > you divide the value by 1000
yet they divided by 3600 to get answer
yet they divided by 3600 to get answer