## 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

# The dog chases the fox

Best Answer bonanova, 07 June 2013 - 08:21 AM

Got it. Similar to previous puzzle.

Spoiler for Golden retriever?

Go to the full post

4 replies to this topic

Senior Member

• Members
• 1837 posts
• Gender:Female

Posted 01 June 2013 - 09:51 PM

A dog hiding in the tall grass at the edge of a circular field spots a fox at the center of the eld. The fox, unable to see the dog but sensing the danger, begins to run at a constant speed along a straight line path towards the safety of a uniformly selected random point at the edge of the eld. At that same instant the dog jumps
the fence and runs straight at the fox at a constant speed M times that of the fox.

Find the probability that the fox will escape the field, and the value of M at which the dog must run to have a 50% chance of catching the fox.

• 0

### #2 Barcallica

Barcallica

• Members
• 151 posts
• Gender:Male
• Location:Room with a View

Posted 02 June 2013 - 07:00 AM

Spoiler for

• 0

### #3 bonanova

bonanova

bonanova

• Moderator
• 6153 posts
• Gender:Male
• Location:New York

Posted 02 June 2013 - 01:37 PM

Nice problem but just to clarify

Spoiler for the dogs path

• 0

Vidi vici veni.

### #4 bonanova

bonanova

bonanova

• Moderator
• 6153 posts
• Gender:Male
• Location:New York

Posted 02 June 2013 - 01:56 PM

Spoiler for for starters

• 0

Vidi vici veni.

### #5 bonanova

bonanova

bonanova

• Moderator
• 6153 posts
• Gender:Male
• Location:New York

Posted 07 June 2013 - 08:21 AM   Best Answer

Got it. Similar to previous puzzle.

Spoiler for Golden retriever?

• 0

Vidi vici veni.

#### 0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users