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Q: The distance covered by a train in (x + 1) hours is (x³ + 1) km. What is the speed of the train?
  • A. (x³ – 1) km/h
  • B. (x²–x+1) km/h
  • C. (x² + x + 1) km/h
  • D. (x+1) km/h
Correct Answer: Option B -
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Explanations:

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