It depends on how the rectangular solid is built. If the side of a cube is "a", then your original solid could be a x a x 54a, or a x 2a x 27a, or 2a x 3a x 9a or one of quite a few others, and the answer depends on the one you specify.
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
There is no limit to the number of cubes which can be arranged on top of a rectangular prism.
Cubes have a square on each side, but rectangular prisms have rectangles or squares.
A rectangular prism has two bases, each of which is a rectangle, and four rectangular sides. The 12 cubes are the same as the rectangular prisms, except that each of the rectangles is a square.
Coal cubes: 0. Sugar cubes: 0 Painted cubes: maybe some of them.
0 sides are not painted! So all the cubes have three faces painted!
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
Cubes have a square on each side, but rectangular prisms have rectangles or squares.
There is no limit to the number of cubes which can be arranged on top of a rectangular prism.
No it is not
How many smaller cubes are not painted at all if a cube is painted green on all sides & cut into 64 cubes of equal size?
Cubes are special cases of rectangular prisms.
Depends on the dimensions of the prism, and how large of cubes they are.
A rectangular prism has two bases, each of which is a rectangle, and four rectangular sides. The 12 cubes are the same as the rectangular prisms, except that each of the rectangles is a square.
2
This is a little odd, but: All squares are rectangles, but rectangles are never squares.
Put all the cubes in a line.