We can hear the sound of the horn of an approaching car before the car reaches, because:

low pitch of horn

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speed of sound is greater than car

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high pitch of horn

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no obstacle is present

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Solution

The correct option is B speed of sound is greater than car
Sound travels through air at an approximate speed of 330 m/s which is many times greater compared to the speed of a car. Hence, due to relative speed, the horn sound of an approaching car is heard first than the car.

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