Why do red ambassadors consume less petrol than white?
Why do manhole covers are generally round?
Why do bucket is always of the shape of invert frustum rather than a frustum or a cylinder?
Why do manhole covers are generally round?
Why do bucket is always of the shape of invert frustum rather than a frustum or a cylinder?
a) They are less in number
ReplyDeleteb) If they were any other shape, the cover had a possibility of getting inside the manhole. For example, the square cover would go diagonally.
c) They can be stacked thus can be transported