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Where Am I?

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#7837
Fun:*** (2.67)
Difficulty:** (1.84)
Category:Science
Submitted By:Adamko***

 

 

 



I start at point X. I walk one mile south, one mile East and then one mile North and arrive back at point X. Where, besides the North Pole, could point X be?



Answer

I am just so far north of the South pole that after travelling the mile south, my mile East takes me on one complete circumference of the pole. Then my mile north will take me back to point X. There are an infinite number of points X on this line of latitude.
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Comments

mad-adeAhu*
Oct 13, 2002

Where exactly is "just so far north" ? this is the real question.
jimbo*au*
Nov 04, 2003

You would be 1 mile from a small circle of radius 1 divided by 2 Pi, or about one sixth of a mile. Since for such a small distance the horizontal distance would be approximately the same as the distance across the surface of the Earth, you would be about 1 mile plus 300 yards (about 2000 yards)from the South Pole! Great teaser!
oosunshyneoo*
Jul 12, 2004

I thought it was the equator! Would this work?
markmonninAus*
Sep 15, 2005

The equator wouldn't work, but there may also be infinite of these lines. If you walk 1 mile south and then walk east, circling the pole more than once and ending up where you were, such as if you would walk around half a mile and be back where you were, then another half mile you'll be back again, and then walk the mile back north. Same with a third of a mile, fourth of a mile, etc.



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