Article View: rec.puzzles
Article #2492Re: Manhole covers - why circular?
From: Keith Lim
Date: Tue, 05 Jan 1993 19:07
Date: Tue, 05 Jan 1993 19:07
18 lines
1285 bytes
1285 bytes
robertw@informix.com (Robert Weinberg) writes: >Manhole covers are manufactured in circular shape, rather than oval or square, >to satisfy one paramount condition. >What is the condition, and why does a circular shape satisfy it? Cute answer: because the manhole itself is circular, and a circular manhole cover (that has a diameter just slightly larger than the hole itself) covers the hole completely with minumum surface area (i.e., uses least material in its making.) Manhole covers are circular to fit the manhole. -- | Simon Fraser University | SFU does not admit to having opinions of Keith Lim | Burnaby, B.C., V5A 1S6 | its own; any found above are mine only. At the edge of the final frontier it waits...for Babylon 5 to blow it away. Star Trek: Deep Space Nine. "To boldly stay where everyone has stayed before."
Technical Details
Message-ID:
<chil.726260849@sfu.ca>Path:
arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!caen!destroyer!cs.ubc.ca!newsserver.sfu.ca!sfu.ca!chilReferences:
<1993Jan5.173440.10482@informix.com>Show Full Headers
Complete Article Headers
Newsgroups: rec.puzzles Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!caen!destroyer!cs.ubc.ca!newsserver.sfu.ca!sfu.ca!chil From: chil@fraser.sfu.ca (Keith Lim) Subject: Re: Manhole covers - why circular? Message-ID: <chil.726260849@sfu.ca> Sender: news@sfu.ca Organization: Simon Fraser University, Burnaby, B.C., Canada References: <1993Jan5.173440.10482@informix.com> Date: Tue, 5 Jan 1993 19:07:29 GMT Lines: 18