Why are Manhole covers round?

United States
November 7, 2006 5:27pm CST
Quick and easy riddle, how many responses until the correct answer comes out?
2 responses
@mythmoh (3994)
• United States
8 Nov 06
the manufacture of circular manhole covers is easier and more accurate than the manufacture of covers of any other shape. round manhole covers, once removed, require less lifting and less manpower, as their shape allows them to be rolled.
@mythmoh (3994)
• United States
8 Nov 06
the manufacture of circular manhole covers is easier and more accurate than the manufacture of covers of any other shape. round manhole covers, once removed, require less lifting and less manpower, as their shape allows them to be rolled.