The fuel economy of a hybrid car eg Toyota Prius is better t

The fuel economy of a hybrid car (e.g., Toyota Prius) is better than that of a car with a standard gasoline engine because: A hybrid car does not have a gasoline engine, so that it does not use any fuel; The gasoline engine in a hybrid car is smaller than in a normal car, so that it uses less fuel; The electric motor and the fuel engine \"cooperate\", and the on-board computer controls the operation of the gasoline engine, assuring that it always works in the most efficient regime; Hybrid car owners are more \"energy-conscious\" and drive more gently than other drivers.

Solution

The reason is (b), because

The fuel efficiency for hybrid cars comes from the many factors such as improved changes in aero dynamics, weight reduction of car, these car uses less powerful gas engine. Most importantly it gives better mileage just by reducing the size of the engine. In fact in any car by reducing size of the engine you can get better mileage. However, this is not done because customer demands as they want all the extra power they look for. Smaller the size less the fuel used.