9 Aug
2007
9 Aug
'07
1:44 p.m.
On Thursday 09 August 2007, Bill Thurston wrote: [for the problem about a sphere with a cylindrical hole of given length]
SPOILER below white space (in head solution that's easy if you're familiar with this kind of thing).
[and some more spoiler space ...] ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... If you don't mind making use of the fact that you know the problem as posed has an answer, it's even easier: you weren't told how wide the cylinder is, so take it to be infinitely thin. Then what you have *is* a spherical ball whose diameter equals the length of the cylinder. -- g