The Speed Paradox

GreshamCollege
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Published on Sep 15, 2008

What is the average speed if you go to Oxford at 40mph and return at 60mph? - It might not be what you expect! Robin Wilson, Gresham Professor of Geometry, runs through this problem and explains why it the average speed is not 50mph.

This is the eleventh part of 'A Millennium of Mathematical Puzzles'.
The full lecture is available (in 24 parts) here on YouTube, or it can be downloaded (like all of our lectures) in its complete form from the Gresham College website, in video, audio or text formats:
http://www.gresham.ac.uk

Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website.

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