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From: ron@brl-tgr.ARPA (Ron Natalie <ron>)
Newsgroups: net.puzzle
Subject: Re: a good interview question (manhole covers)
Message-ID: <9248@brl-tgr.ARPA>
Date: Fri, 15-Mar-85 13:50:54 EST
Article-I.D.: brl-tgr.9248
Posted: Fri Mar 15 13:50:54 1985
Date-Received: Sun, 17-Mar-85 02:18:03 EST
References: <1300@ut-sally.UUCP> <441@hou2b.UUCP>
Organization: Ballistic Research Lab
Lines: 11

> There is a shape other than a circle which would prevent the manhole
> cover from falling through.  What is it?

There are several.
	Triangle, pentagon, etc...

By the way, the two answers I was looking for were:
	1.  So it won't fall in.
	2.  Because manholes are round.

-Ron