Problema Solution
Your car gets 30 mpg on the highway. If gas costs $4.20 per gallon, how much does it cost to drive your car per mile?
Answer provided by our tutors
the car is driving 30 miles with 1 gallon
lets say the car needs x gallons to drive 1 mile
30 : 1 = 1 : x
x = 1/30 gal
the car needs 1/30 gal to drive 1 mile
since the cost of the gas is $4.20 per gallons the cost of 1/30 gallons will be
(1/30)*4.20 = $0.14
it costs $0.14 per mile to drive your car on the highway.