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How long did it take to transmit a message from Paris to Lille using the semaphore system?

  • 20 minutes

  • 1 hour

  • 3 hours

  • 6 hours

Answer

Using the semaphore system, it took approximately 3 hours to transmit a message from Paris to Lille, a distance of about 220 km. This was a significant improvement over traditional methods of communication at the time.
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