Question

A gallon of gasoline contains about 36 kilowatt hours of energy. a gallon of gas cost $2.50. a kilowatt hour of electricity costs 8 cents. which form of energy is less expensive?

Answer 1

Use conversion method to convert gallons of gasoline into cents per kilowatt hour in order to compare the two forms of energy.

`(1 gal)/(36 kwhr) x (2.50)/(1 gal) = (2.50)/(36 kwhr) = 0.07`

The cost of gas is $0.07 per killowatt hour
The cost of electricity is $0.08 per killowatt hour

Answer: Gasoline is less expensive