Rectangular solid
A rectangular solid is a 3 dimensional object with 6 sides, 8 vertices and 12 edges, all of which are rectangles.

Formulae used
l = length of cuboid
w = width of cuboid
h = height of cuboid
Volume of cuboid = l × w × h
Surface area of cuboid = (2 × l × h) + (2 × l × w) + (2 × h × w)
Diagonal of cuboid = √(l2 + w2 + h2)