Mathematics · Doppler Effect
A driver in a car, approaching a vertical wall, notices that the frequency of his car horn has changed from 440 Hz to 480 Hz when it gets reflected from the wall. If the speed of sound in air is 345 m/s, then the speed of the car is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 124 km/h
- 218 km/h
- 336 km/h
- 454 km/h✓
Correct answer
54 km/h
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