The slow door will travel how far as compared to the fast door?

The correct understanding of door travel distance between slow and fast doors hinges on the mechanics of elevator door operations. In elevator systems, the term "slow door" typically refers to a door that operates at a reduced speed while still closing fully and completely. Conversely, a "fast door" operates at a higher speed but also covers the same range of motion necessary for safe and efficient operation.

However, when considering the question in terms of travel distance relating to the speed of operation, it becomes clear that both types of doors will reach the same endpoint physically – the fully open or fully closed position. Thus, while the slow door takes more time to travel to that position, it does not necessarily travel a different distance than the fast door.

Therefore, both the slow door and the fast door cover the same actual distance when they open and close, leading to the conclusion that the slow door will travel the same distance as the fast door. This principle is key in understanding how elevator door mechanisms work regarding timing and operation but does not influence the distance traveled by either door type.