Answer:
Diagonal of base is 8.94 (approx)
Explanation:
Consider the given dimension
Length = 8 units
width = 4 units
and height = 2 units.
We have to find the diagonal (d) of the base.
Since the solid, having 3 sides length, breadth and height is a cuboid. So, its base must be a rectangle.
Also, base have dimension length and width.
So, Diagonal of base =

Substitute the values, we get,
Diagonal of base =

Diagonal of base =

Diagonal of base =

Diagonal of base = 8.94 (approx)
Thus, diagonal of base is 8.94 (approx)