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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: <9314@brl-tgr.ARPA>
Date: Mon, 18-Mar-85 15:22:16 EST
Article-I.D.: brl-tgr.9314
Posted: Mon Mar 18 15:22:16 1985
Date-Received: Fri, 22-Mar-85 02:47:05 EST
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Organization: Ballistic Research Lab
Lines: 13

> > > 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...
> > 
> 
> I disagree that triangles and pentagons couldn't fall through.

Your right, it's been demostrated to me.  The height of the triangle (even
an equilateral one is 15% smaller than the edge.

-Ron