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Q: A train covers a distance in 30 min if it runs at a speed of 54 km/h on an average. The speed at which the train must run to reduce the time of the journey to 20 min is:
  • A. 81 km/h
  • B. None of these
  • C. 75 km/h
  • D. 60 km/h
Correct Answer: Option A -
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Explanations:

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