Final answer:
The top of a standard wall hung cabinet is normally positioned at a height of 1.715 meters from the floor. This height is chosen to align with ergonomic standards and to match the user's convenience in tandem with other fixtures like mirrors.
Step-by-step explanation:
Kitchen wall cabinet heights are 12, 15, 36, and 42 inches. In most kitchens, the wall cabinets are typically 30 or 36 inches tall. The space between the top of the cabinets and the ceiling can be left open or it can be enclosed by soffits. When installing a wall hung cabinet, the standard practice is to position the top of the cabinet at a height of 1.715 meters from the floor.
This measurement ensures that the cabinet is placed at a convenient height for average users. In the scenario provided, it seems that the cabinet is part of a set-up that includes a mirror with a height of 0.890 meters, which is described as being precisely one-half the height of the person using the mirror. This level of detail in design is intended to match the ergonomics of the user and the aesthetics of the space.