Yanni's scooter uses 7 gallons of gasoline to travel 85 kilometers. His dad does some mechanical work to the scooter such that it now uses 5 gallons of gasoline to travel 70 kilometers. If the price of gasoline is $2.85 per gallon, how much less, to the nearest cent per kilometer, will it cost to run the scooter after his dad does some mechanical work?

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21 June, 15:56

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Osvaldo Hunt · Answer 1

5*2.85/70 = 0.2035714285

7*2.85/85 = 0.2347058823

0.2035714285 - 0.2347058823 = - 0.03113445372

It costs 3 cent per kilometer less after the work.