"Wayne.B" wrote in message
...
On Tue, 27 Jan 2009 16:48:47 +0000, Gordon wrote:

This is from the Brian Toss rigging book so if you want to cheat, you
can look it up.

If I string a line around the equator (disregarding natural
obstacles) and then decide I want that line 1 foot above the equator all
the way around, how much longer must that line be? Call the earth's
diameter an even 8000 miles.
G

3.14 ft

No, you have forgotten that it is 1' higher all round so the diameter has
increased by 2' not 1'