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

- - - - -

Traveling a hot desert

  • Please log in to reply
1 reply to this topic



    Senior Member

  • Members
  • PipPipPipPip
  • 1837 posts
  • Gender:Female

Posted 20 February 2013 - 10:27 PM

**Hopefully this one is not actually a chestnut :) **


A military tank needs to cross a two hundred mile dessert (a straight flat path).  The tank can travel 1 mile per gallon of gas and can only hold 40 gallons of gas in its tank.  The tank is carrying its maximum capacity when it contains 40 gallons of gas (so you may not store additional gas anywhere on the tank); however, your crew knows of a way to store gas in the desert sand for retrieval at a later time.  Presume that you have an infinite source of gas at the starting point.  How much gas will it take to cross the dessert?  How many times would you need to turn back towards the starting source? How many miles will you travel?

Edited by BMAD, 20 February 2013 - 10:32 PM.

  • 0

#2 bonanova



  • Moderator
  • PipPipPipPip
  • 6158 posts
  • Gender:Male
  • Location:New York

Posted 21 February 2013 - 12:36 AM

It's of a chestnut genre.

But the solution is specific to the numbers provided, and I have yet to work through one of them.

Have at it. ;)

  • 0

Vidi vici veni.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users