Question

A gallon of milk weighs eight pounds, so you wouldn't try to carry three or four gallons home on your bicycle. gasoline is a bit less dense than milk—oil floats on water—and 6 pounds per gallon of gasoline is about right. a typical u.s. "car" (whatever it is we drive—averaging somewhere between a prius and a hummer, and including a lot of pickup trucks and minivans) gets about 20 miles per gallon, and drives about 12,000 miles. so, how many gallons of gas per year?

Answer 1

600 gallons per year.
take the total amount of miles driven and divide by the miles per gallon to get the average gallons used per year. (the other information is meant to be a distractor.) 12000/20 = 600