MECHANICS Problem No. 36

Module # MECH_P_036_Raymond_Serway_John_Jewett Statement Assume there are 100 million passenger cars in the United States and the average fuel efficiency is 20 mi/gal of gasoline. If the average distance traveled by each car is 10000 mi/yr, how much gasoline would be saved per year if the average fuel efficiency could be increased to 25 mi/gal? Solution Given data is No. of passenger cars = 100 million = 100 X 106 = 108 = 100000000 Average distance traveled by one car in a year = 10000 mi/yr =104 mi/yr Average distance traveled by 108 cars in a year = 108 X 104 mi/yr = 1012 mi/yr Actual Average Fuel Efficiency = 20 mi/gal Expected Average Fuel Efficiency = 25 mi/gal