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ARC-Challenge / Mercury_409114 / John drove a truck for one hour at a rate of 80 kilometers per hour. The next…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

John drove a truck for one hour at a rate of 80 kilometers per hour. The next hour, he drove at 100 kilometers per hour. What was his average speed during those two hours?

choices

  • 80 kilometers per hour
  • 90 kilometers per hour
  • 100 kilometers per hour
  • 180 kilometers per hour

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