Rope puzzle

2

2scoops0406

Here's another one but with far less safety implications (I may have lifted this from this forum so apologies if I have)

Assume the earth is a perfect sphere. You have a rope that stretches arounf the equator so the the ends of the rope just touch.

Now you want the same rope to be uniformly suspended 1 foot above the surface, how much extra rope do you need?
 
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Well sorry about not being intuitive, the point is well made, in that I had to check the calculation a couple of times as I originally thought I'd made a mistake.
 
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sorry to get in a bit late on this one, are you saying the rope only has to be 6' longer?
 
so what if it was round the circumferance of an elephants belly would it still need to be 6' longer to hover 1'?
 
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