Funny question!Do you know why the sewer cover is round rather than square?

South Korea
November 15, 2007 6:45pm CST
It is an interview question of Microsoft, so do you know the answer?
1 response
Ciniful
@Ciniful (1587)
• Canada
16 Nov 07
A round sewer cover can't fall through a round opening, no matter how you twist and turn it, while a square one can if turned the right direction.