Re: formula for great circle computation

From:         Jon Ward <Jon_Ward@blibble.demon.co.uk>
Organization: The End at Infinity
Date:         05 Oct 95 13:26:02 
References:   1 2 3
Followups:    1
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This question reminds me of a classic mathematics/physics problem, which
I believe is worth considering :

Assume that the earth is a perfect sphere.

I lay a rope around a great circle of the globe. I then lay a second rope
around the same great circle, but the second rope is ten metres above the
ground all the way around.

How much longer is the second rope?

Once you have the answer, consider the fact that the last trans-Atlantic
flight I flew on cruised at 37,000 ft above sea-level.

Jon Ward
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