The car consumes 3 gallons and 8.2 gallons of fuel respectively.
The gas mileage is the number of miles that can be covered by a car for a particular amount of fuel.
We are given that the gas mileage of the car is 30 miles per gallon, that means that the car consumes 1 gallon of fuel for each 30 miles covered.
The amount of fuel needed to cover the following distance is:
a) For 90 miles, let x represent the number of gallon of fuel. Hence:
Distance covered / amount of fuel = 30 miles per gallon
90/x = 30
x = 90/30
x = 3 gallons
b) For 246 miles, let x represent the number of gallon of fuel. Hence:
Distance covered / amount of fuel = 30 miles per gallon
246/x = 30
x = 246/30
x = 8.2 gallons
Therefore the car consumes 3 gallons of fuel for 90 miles and 8.2 gallons for 246 miles.
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