Answer: The station clock is 3 minutes fast. The morning journey took 65 minutes, and the evening journey therefore took 52 minutes, and the train arrived 57 minutes after it should have left, that is, 3 minutes early.
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The station clock is 3 minutes fast. The morning journey took 65 minutes, and the evening journey therefore took 52 minutes, and the train arrived 57 minutes after it should have left, that is, 3 minutes early.
Answer: The one that doesn't work is best as it will always be correct twice a day, but the one that loses a minute a day will not be correct again for 720 days (losing 720 minutes or 12 hours).
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The one that doesn’t work is best as it will always be correct twice a day, but the one that loses a minute a day will not be correct again for 720 days (losing 720 minutes or 12 hours).