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Another Water-Based Puzzle
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capstinence



Joined: 12 May 2005
Posts: 44
Location: Los Angeles, CA

PostPosted: Mon May 16, 2005 2:18 am    Post subject: Another Water-Based Puzzle Reply with quote

There is a rope ladder hanging over the side of a ship. Each of the rungs of the ladder are a meter apart. The tide rises at the rate of 80 centimeters an hour. How many rungs are covered after four hours?

Last edited by capstinence on Mon May 16, 2005 2:34 pm; edited 1 time in total
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PostPosted: Mon May 16, 2005 12:11 pm    Post subject: Reply with quote

I need more details, as many as you can give. starting position of the latter is going to matter. Also want to verify that metre = meter = 100 centimeters so that i can exclude any tricks.
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capstinence



Joined: 12 May 2005
Posts: 44
Location: Los Angeles, CA

PostPosted: Mon May 16, 2005 2:34 pm    Post subject: Reply with quote

You do not need any more details, but sure - a meter is 100 centimeters (I fixed the spellings).
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OSUsammy13



Joined: 14 May 2005
Posts: 9

PostPosted: Mon May 16, 2005 10:17 pm    Post subject: Reply with quote

I have looked at this several times and I finally got the right answer (not posted b.c I donít want to ruin the suspense). This is clever but very strait forward.
Next time someone asks for more details, even if they aren't relevant to finding the answer, it would be a good technique just to make up the details. Word problems are great when you have to decipher the relevant data.

Also - Forum postings should have spell check, engineers - specifically me - are not able to spell.
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Konquest



Joined: 08 Jun 2005
Posts: 3

PostPosted: Wed Jun 08, 2005 5:18 pm    Post subject: Reply with quote

The answer is pretty straightforward... I'll white it just below, so there is minimal spoilers...

The boat rises with the tide, so the rope ladder is not covered by the tide coming up...Big smile
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Michael Chu



Joined: 10 May 2005
Posts: 1617
Location: Austin, TX (USA)

PostPosted: Sat Feb 28, 2009 9:22 am    Post subject: Reply with quote

But how many rungs were covered to begin with? Without that info, the question is unanswerable.
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GaryProtein



Joined: 26 Oct 2005
Posts: 535

PostPosted: Tue Mar 03, 2009 2:53 am    Post subject: Reply with quote

Michael Chu wrote:
But how many rungs were covered to begin with? Without that info, the question is unanswerable.



The question could be re-worded, "How many MORE rungs would be covered after four hours." That way, the initial number of rungs does not affect the final answer.
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Michael Chu



Joined: 10 May 2005
Posts: 1617
Location: Austin, TX (USA)

PostPosted: Tue Mar 03, 2009 6:06 am    Post subject: Reply with quote

GaryProtein wrote:
The question could be re-worded, "How many MORE rungs would be covered after four hours." That way, the initial number of rungs does not affect the final answer.

Ah, yes. Then the answer would be straightforward.
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Riprap



Joined: 23 Nov 2009
Posts: 1

PostPosted: Mon Nov 23, 2009 2:57 pm    Post subject: Reply with quote

Since the ship is afloat the level of the water on the ladder would not change.
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PostPosted: Sun Dec 13, 2009 4:29 pm    Post subject: Reply with quote

Riprap wrote:
Since the ship is afloat the level of the water on the ladder would not change.


Sure post the puzzle but not a solurtion can someone please post the answer for those of us frustrated? Smile

___________
JerryH Developer
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Auspicious



Joined: 29 Dec 2005
Posts: 58
Location: on the boat, Annapolis, MD

PostPosted: Tue Dec 15, 2009 3:50 pm    Post subject: Reply with quote

Perhaps I have a warped sense of humour, but I find this a hysterical question. I sailed into Nassau Harbour this morning with three cruise ships in front of me and two behind me. I've had my first shower in three days and laundry is going. I check in here to see if there is anything that might contribute to dinner tonight and find a buoyancy puzzle.

sail fast and eat well, dave
S/V Auspicious
lying Nassau Bahamas
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Auspicious



Joined: 29 Dec 2005
Posts: 58
Location: on the boat, Annapolis, MD

PostPosted: Tue Dec 15, 2009 7:04 pm    Post subject: Reply with quote

Just re-read the original post -- 1 meter spacing? Golly! How about 20 - 30 cm like every pilot ladder I can see from here?
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Dilbert



Joined: 19 Oct 2007
Posts: 999
Location: central PA

PostPosted: Tue Dec 15, 2009 9:37 pm    Post subject: Reply with quote

>> 1 m spacing

indeed, but the spacing - whatever it is - is not relevant.
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Auspicious



Joined: 29 Dec 2005
Posts: 58
Location: on the boat, Annapolis, MD

PostPosted: Wed Dec 16, 2009 6:18 pm    Post subject: Reply with quote

Dilbert wrote:
>> 1 m spacing

indeed, but the spacing - whatever it is - is not relevant.


It's relevant if you're trying to climb it! *grin*

sail fast and eat well, dave
S/V Auspicious
lying Nassau Bahama
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Gary
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PostPosted: Tue Feb 26, 2013 2:28 am    Post subject: Reply with quote

Since no one else did, I have to do this. The answer, incredible as it may seem, is zero. No more rungs were covered. So many were hung up on a mathematical problem when, in actuality, absolutely NO math is involved. So rung spacing IS totally irrelevant! When the tide comes in the ship rides up with it. And since the ladder is attached to the ship, it rises also. So many couldn't see the problem for what it really was. It was actually quite ingenious! I loved it. "Auspicious" hit when he said buoyancy!
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