It is known that a domestic car consumes 8 liters of gasoline for every 100 km. What is the mass of gasoline consumed by the car for 100 km

It is known that a domestic car consumes 8 liters of gasoline for every 100 km. What is the mass of gasoline consumed by the car for 100 km

The volume of 8 liters of gasoline is 8000 ml, which is also 0.008 cubic meters
If the density of gasoline is 725 kg / m3, 725 × 0.008 = 5.8 kg

A small displacement car consumes 8 liters of gasoline per 100 km, and a slightly larger displacement car consumes 15 liters of gasoline per 100 km?

A small displacement car can save 15-8 liters of gasoline compared with a large displacement car when traveling 100 kilometers
You can save 7 × 90 / 100 = 6.3 liters when you travel 90 km

The theoretical fuel consumption is 6L / 100km. It is known that 1L = 10-3m3, and the density of gasoline is 0.70 times the cubic kg / m3 of 10
The capacity of the mailbox is 50L and the maximum speed is 160 km / h

M = ρ v = 0.70 times the third power of 10 kg / m3 * 0.05m3 = 35kg