A brand of new car, at the speed of 20 meters per second on the flat road, consumes 10L of gasoline per 100km. The density of gasoline is known It is the third power of ρ = 0.71 × 10, kg / m3 (1) How long does it take for the car to travel at a constant speed of 100km? (2) What is the mass of gasoline consumed by a car for every 100km?

A brand of new car, at the speed of 20 meters per second on the flat road, consumes 10L of gasoline per 100km. The density of gasoline is known It is the third power of ρ = 0.71 × 10, kg / m3 (1) How long does it take for the car to travel at a constant speed of 100km? (2) What is the mass of gasoline consumed by a car for every 100km?

1) Time t = s / v = 100000 / 20 = 5000S = 1.389h
2) The volume of gasoline consumed for driving 100km is 10L
Its mass is 710 * 0.01 = 7.1kg

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