Why are man hole covers round?

[FightinMike]

how is a 2 man team going to move a manhole cover if it were say square?

round things roll.

EDIT: Wow there is a actually a wiki on this question with 9 different answers.

[JUICEDSS]

@FormulaLS1"

I was at an interview in DC a couple weeks ago and this question came up.

It’s a popular interview question used at Microsoft

So with out looking up the possible answer post up…

What company did you interview at? I used to ask that question to all candidates when I worked in DC.

[RedGoober4Life]

@Fry

The water level goes down. A buoyant object (like a boat/rock/person system) will displace an amount of water equal to its weight. A non-bouyant object like a rock will displace an amount of water equal to its volume. Since the rock is denser than water, an equal weight of water is more volume than the rock.

Do you mean wolume?

[LZ1]

@JUICEDSS

What company did you interview at? I used to ask that question to all candidates when I worked in DC.

ReVision its a DoD contractor…Built the fiber san for the DoD/Pentagon and did a few other major projects.

[Geehee]

@JUICEDSS

What company did you interview at? I used to ask that question to all candidates when I worked in DC.

what were you looking for when you asked that question?

[MaximaSE98]

if they were sqaure they would be a basin…like a catch basin for storm drainage

[JUICEDSS]

@evolve

what were you looking for when you asked that question?

Nothing in particular. Just a question followed by my comment.

[walter]

@ILCisDEAD

umm… the water level would stay the same…

edit: thinking into it more… I guess the density of the rock would come into play

and by thinking, you mean reading the previously posted answer :gtfo: