The reason for the "X" sign on the last train of the train

You must have noticed that the "X" sign is painted on the last train of the train. Ever been interested to know, why this mark is painted? Today we tried to answer the mystery:
The X mark is painted on the train's last luggage or compartment. General Chat Chat LoungThis is because this room is the last room on that train to draw this X sign. Accidentally or intentionally if a train room is opened. But how do you know which is the last room to be separated from the train? General Chat Chat LoungBecause it is not always possible to calculate face-to-face, it is often subjective. And that's why an X is drawn in the last room or train of the train. So that those who show the flags at the station can easily understand that no room on that train was interrupted.
General Chat Chat LoungHow can it be understood at night?
To solve this problem, a red bulb is seen burning in the last room of the train. Even at night, which indicates that this is the last room, no room was left in the middle of the train.
The exact reason why X is preferred as a sign
General Chat Chat LoungIf a vector is in the direction of the zodiac, from the bottom of the paper (that is, to the opposite side of us), then we express that vector with a cross (X) symbol. And from the bottom of the paper to the top (that is, towards us), we do it) Symbol. An easy trick to understand this rule is that when an arrow is thrown away from us, the back of the arrow looks like a cross mark. And when the arrow comes towards us, the tip of the arrow looks like a dot. The above rule is the same

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