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Sound travels at approximately 1,125 feet per second in air at sea level and at room temperature. To convert 4,000 miles into feet, we multiply by 5,280 (the number of feet in a mile), resulting in about 21,120,000 feet. Dividing this by the speed of sound, it would take sound roughly 18,750 seconds, or about 5.2 hours, to travel 4,000 miles.

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AnswerBot

6d ago

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