A square has width and height. Width is the horizontal line, height is the vertical line. This is a two-dimensional object and has an area.
A cube is a square with one more dimension, length, which makes it a three dimensional object. As a three-dimensional object, it no longer has an area, but now has volume.
To find the area of a cube (a three-dimensional object), one must multiply three dimensions (length, width, and height) to obtain the volume of the cube.
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Use the volume formula length time width time height
Volume = Length x Width x Height. If the prism is square, then either Height = Width or Height = Length In the first case, Volume = Length x Width2 and so Width = sqrt(Volume/Length) and Height = Width. In the second case, Volume = Length2 x Width and so Width = Volume/Length2 and Height = Length.
To find the width of a volume using only the length and height, you would need to know the formula for the volume of the object. If the object is a rectangular prism, the formula for volume is length x width x height. If you know the length and height, you can rearrange the formula to solve for the width: width = volume / (length x height). This will give you the width of the volume based on the provided length and height.
For a cuboid it gives its volume.