Final answer:
The train left 46 minutes late from its scheduled departure time of 3:37pm, so it departed at 4:23pm.
Step-by-step explanation:
The train was scheduled to leave at 3:37pm, but it left 46 minutes late. To calculate the departure time, we simply add the minutes the train was late to the scheduled departure time. 3:37pm + 46 minutes brings us to 4:23pm, which is the time the train actually left the station.