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Q: The speed of a train is 78 km/h. It crosses a tunnel in 45 s and overtakes a person walking at a speed of 6 km/h in the same direction in 15s. The length (in m) of the tunnel is:
  • A. 675
  • B. 650
  • C. 975
  • D. 780
Correct Answer: Option A -
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Explanations:

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