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A car is moving at 30 m/s. The cars horn is emmitting a 220 hz sound. The speed of sound is 343 m/s. How far does the the car move in one period of the sound emitted from the horn.

I am having a problem determining the distance formula.

The period of the 220 hz sound is 1/220hz = 4.54 ms

so in 4.54 ms the sound has travelled 1.55722 meters (343 * .00454)

Now the distance the car travels would be (4.54 ms * 30 m/s) = .1362 meters

Is this the correct way to go about this problem?