The question makes no sense. What on earth is a 18 foot square cube? Is it a cube each of whose faces is 18 square feet? Is it a cube each of whose edges is 18 feet - in which case why is the word "square" present?
one cubic foot contains 9 square feet * * * * * That is totally incorrect. A square foot is a measure of area - a 2-dimensional concept. A one foot cube is a 3-dimensional object. The two are measures of different things and it makes no sense to try to relate one to the other.
A cube has 6 square faces.
Square pyramid: 5 Cube: 6
There are 123456789 kg of gold in a one metre cube.
The square prism is just a cube. It has 6 faces in a cube
A square cube has 8 vertices, 12 edges and 6 faces
300
Cube: 12, square based pyramid: 8
A square cube has 8 vertices, 12 edges and 6 faces
A 3D square is surely a cube? Therefore, a cube has 6 faces.
It depends if you are talking about a cube or just a square. A cube has 6 faces and a square has only 4.
It has 6 square faces, 12 edges and 8 vertices