Final answer:
The question is related to the Mathematics subject, specifically volume calculations, typically addressed at the Middle School level.
Step-by-step explanation:
The subject of the question falls under the category of Mathematics, specifically dealing with the concept of volume. When looking at the various statements provided, each either directly discusses volume, such as the Rubik's cube with a volume of 185.2 cm³, or indirectly relates to the calculation of volume, like determining the side length of a cube based on its surface density and total mass. These types of questions typically involve applying geometric formulas to find the volume of objects or understanding the relationship between different units of measurement in volume.
Mathematical problems like these are commonly encountered by students at the Middle School level, where they are encouraged to enhance their problem-solving skills and understand fundamental geometric concepts.