How many liters of fuel does a 50-liter tank running 700 kilometers consume?

[MacFinley]

A 50-liter tank running 700 kilometers is equivalent to 7.1 liters of gasoline per 100 kilometers. Here is some extended information about gasoline: 1. Development Background: In the mid-19th century, people had not yet recognized the importance of gasoline. At that time, kerosene for lamps was widely used. Petroleum refining relied on simple distillation processes to separate components with different boiling points. Kerosene, with a higher boiling point, was safer for lamp use and became the primary product of crude oil refining, while gasoline and other components were often burned as fuel. 2. Carcinogenic Substances: On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) released a preliminary list of carcinogens, classifying engine exhaust and gasoline as Group 2B carcinogens.