Question

How does driving at constant and moderate speed help in saving petrol? ​

Answer 1

Explanation:

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Driving at the acceptable speed limit is safer and increases the fuel economy. As for highway driving, over 50% of the power produced by the engine is used to overcome aerodynamic drag. For this reason, fuel consumption increases rapidly at speeds above 90km/h. ... Driving at a moderate speed increases the fuel efficiency.

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Answer 2

Answer:

Driving at the acceptable speed limit is safer and increases the fuel economy . As for highway driving, over 50% of the power produce by the engine is used to overcome aerodynamic drag . For this reason, fuel consumption increases rapidly at speeds above 90km/h .

Explanation:

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