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mzplcg
Member Since: 23 Jun 2009
Location: Gone
Posts: 1087
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OK, a man is walking home with his dog at a steady 4mph.
With 6 miles to go he lets the dog off the lead and the dog then runs all the way home at 6 mph.
When the dog gets to the house he immediately turns and runs back to his owner at the same speed, 6mph and upon meeting him it turns and runs home again. It continues to run back and forth at the same speed until the man reaches home.
What distance has the dog run since being let off the lead ?
And waits for all answers which assume the earth has stopped revolving  Mentioning no names Trev 
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 15th Mar 2010 10:06 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50975
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9 miles of course  21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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| 15th Mar 2010 10:09 pm |
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NJF
Member Since: 05 Oct 2007
Location: Gone
Posts: 2466
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9 miles (the man takes one and a half hours to walk 6 miles at 4mph, and a dog running at 6mph for one and a half hours would cover 9 miles in that time.)
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| 15th Mar 2010 10:10 pm |
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roamingman
Member Since: 25 Jun 2008
Location: aberdeenshire
Posts: 525
  
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bloodey long way,  convoy For Heroes record holder (348)
Live life 'til you die
Team Teddy Bears Picnic
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| 15th Mar 2010 10:11 pm |
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LRNoob
Member Since: 02 Jan 2010
Location: Den Haag
Posts: 28
  
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9 miles, I think, my brain is starting to hurt. There must be some empirical way to work this out using simple logistical maths but I just wasted half a tree and a litre of ink  doing it the old fashioned way. Oh and I've got splinters in my fingers from scratching my head  Peter
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| 15th Mar 2010 10:33 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50975
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LRNoob wrote: There must be some empirical way to work this out
Yes ...just copy the question and paste it into the Google search bar  21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
Last edited by DG on 15th Mar 2010 10:37 pm. Edited 2 times in total
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| 15th Mar 2010 10:35 pm |
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LRNoob
Member Since: 02 Jan 2010
Location: Den Haag
Posts: 28
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There you are, NJF. Knew there must be a simple solution. I wish I had waited five minutes for his answer. I'll have to go for a lie down in a dark room now. But as its bed time that fits in nicely with my plans for the rest of the evening. Peter
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| 15th Mar 2010 10:35 pm |
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MARKW
Member Since: 29 Aug 2008
Location: SW
Posts: 2390
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Another one.
A workman takes 2 hrs to dig a hole. After 1 hr has he dug a whole hole or only 1/2 a hole.
What do you reckon? HONI SOIT QUI MAL Y PENSE
They shall not grow old as those of us left grow old. Age shall not weary them, nor the years condem. At the going down of the sun, and in the morning WE WILL REMEMBER THEM
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| 15th Mar 2010 11:06 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50975
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Any holes a goal  21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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| 15th Mar 2010 11:08 pm |
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DaveT
Member Since: 01 Aug 2005
Location: Cornwall
Posts: 2573
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Dig 
Nope, after one hour he will have read half the jobpack (used to be a jobsheet, but these days more like a book), contacted the office to let them know he's arrived at site, notified the customer, done the risk assessment, set up the chapter eight, unloaded the mini digger, called for a grab wagon to take away the spoil and deliver some backfill... Long succession of Disco's since 2001...
SIII Lightweight - neglected & rusting. Bulkhead, A panels, vent panel & outriggers now disintegrated - Next years project!
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| 15th Mar 2010 11:33 pm |
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