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3 years ago

9

A truck is traveling at 74.5 kilometers per hour away from you. The driver is blowing the horn which has a frequency of 415 Hz.

The speed of the sound is 346 m/s. What is the observed frequency of the sound? 346 Hz 392 Hz 415 Hz 441 Hz

2 answers:

Amanda [17]3 years ago

6 0

Answer: option D is the answer!

slega [8]3 years ago

5 0

$\frac{415}{f} = \frac{346- \frac{745}{36} }{346+0}$
f=441.40

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