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      Question

      A train 120 m long passes a pole in 8 seconds. Find the

      speed of the train in km/h.
      A 25 km/h Correct Answer Incorrect Answer
      B 32 km/h Correct Answer Incorrect Answer
      C 40 km/h Correct Answer Incorrect Answer
      D 54 km/h Correct Answer Incorrect Answer

      Solution

      Distance covered = length of train = 120 m Time = 8 s Speed in m/s = Distance Γ· Time = 120 Γ· 8 = 15 m/s Convert m/s to km/h: multiply by 18/5 Speed in km/h = 15 Γ— (18/5) = 3 Γ— 18 = 54 km/h Answer: 54 km/h

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