Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

A miraculous voyage


Best Answer Rob_Gandy, 13 May 2013 - 08:59 PM

Spoiler for Aha!

Go to the full post


  • Please log in to reply
4 replies to this topic

#1 BMAD

BMAD

    Senior Member

  • Members
  • PipPipPipPip
  • 1702 posts
  • Gender:Female

Posted 13 May 2013 - 08:53 PM

A traveler just came back from where they observed the most 'miraculous' thing.  He visited four small towns in four days.  Each town was exactly five miles from each other.  Never in his life could he have expected to see four towns that were all the same distance from each other.  How was this feat achieved?


  • 0

#2 Rob_Gandy

Rob_Gandy

    Advanced Member

  • Members
  • PipPipPip
  • 175 posts
  • Gender:Male
  • Location:Garland, TX

Posted 13 May 2013 - 08:59 PM   Best Answer

Spoiler for Aha!


  • -1

#3 bonanova

bonanova

    bonanova

  • Moderator
  • PipPipPipPip
  • 5918 posts
  • Gender:Male
  • Location:New York

Posted 14 May 2013 - 03:19 AM

Spoiler for must be


  • 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#4 unakade

unakade

    Newbie

  • Members
  • Pip
  • 2 posts

Posted 17 May 2013 - 05:53 PM

But, how can it be a tetrahedron? The cities are just 5 miles away. Any 4 points on the surface of the earth which are also the vertices of a tetrahedron must be at a distance of 1.63 times the radius of the earth (which is about 6500 miles!!!).


  • 0

#5 Pickett

Pickett

    Senior Member

  • Members
  • PipPipPipPip
  • 542 posts
  • Gender:Male
  • Location:40°N 83°W +/-10'

Posted 17 May 2013 - 06:01 PM



But, how can it be a tetrahedron? The cities are just 5 miles away. Any 4 points on the surface of the earth which are also the vertices of a tetrahedron must be at a distance of 1.63 times the radius of the earth (which is about 6500 miles!!!).

Spoiler for Well given that and the OP


Edited by Pickett, 17 May 2013 - 06:02 PM.

  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users