A common car engine is 20% efficient.When cruising,the car encounters an average retarding force of 1000 N.If the energy content of gasoline is 40 MJ/L,how many kilometers per liter does the car achieve?

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The Answer of A common car engine is 20% efficient.When cruising,the car encounters an average retarding force of 1000 N.If the energy content of gasoline is 40 MJ/L,how many kilometers per liter does the car achieve?

A Common Car Engine Is 20% Efficient