Tuesday, January 10, 2006

Why round?

Here's a trivia question for you. Why are manhole covers round and not square?

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2 comments:

  1. So the cover doesn't fall through the hole?

    ReplyDelete
  2. That's right, Andrew. Square covers can fall down the hole they are covering. But no matter how you turn a round cover, the diameter will never be shorter than the hole.

    ReplyDelete

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