Question

Assume there are 100 million passenger cars in the. United States and that the average fuel consumption is. 20 mi/gal of gasoline. If the average distance traveleD) by each car is 10 000 mi/yr, how much gasoline would be saved per year if average fuel consumption could be increased to 25 mi/gal?

Answer 1

10,000 miles : 20 mi/gal = 500 gal
10,000 miles : 25 mi/gal = 400 gal
500 - 400 = 100 gal ( saved per year )
100 x 100,000,000 = 10,000,000,000
Answer: 10 billion gallons of fuel would be saved if the average fuel consumption mi/gal was increased to 25.