A car speeds towards the outside wall with its horn sounding a frequency of 160 HZ. The sound waves reflected off the wall cause the driver to hear 8.0 beats per second. There is no wind and the speed of sound is 343 m/s. Find the speed of the car.
The Attempt at a Solution
Well with the beats being 8, ive reckoned that the sound that the driver hears is either 152 or 168 HZ. But neither of those two frquencies lead me to the correct answer. Ive thought that the frequency the driver hears should be 168 HZ because the freqquency goes up in situations like that.
What do you guys/girls think?