(Answered) A truck horn emits a sound with a frequency of 245 hz the

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A truck horn emits a sound with a frequency of 245 Hz. The truck is moving on a straight road with a constant speed. If a person standing on the side of the road hears the horn at a frequency of 270 Hz, then what is the speed of the truck? Use 340 m/s for the speed of the sound.

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