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Daily Puzzles - The Revenge - #13 - Big revolving Apple

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David J. Bodycombe

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Jun 27, 1998, 3:00:00 AM6/27/98
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An easy one for a bit of light relief:

I had dinner tonight in the only revolving restaurant in New York, in the
Marriott Hotel in Broadway.

It took 90 minutes to do one complete revolution, and a point on the outside
circumference of the circular restaurant appeared to move at exactly 1 inch
per second, relative to the fixed ground.

Therefore, what was the diameter of the restaurant?

David
------------------------------------------------
David J. Bodycombe
Proprietor, Labyrinth Games
http://www.lab-games.home.ml.org
Puzzle and game show consultancy

RM Mentock

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Jun 28, 1998, 3:00:00 AM6/28/98
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David J. Bodycombe wrote:
>
> An easy one for a bit of light relief:
>
> I had dinner tonight in the only revolving restaurant in New York, in the
> Marriott Hotel in Broadway.
>
> It took 90 minutes to do one complete revolution, and a point on the outside
> circumference of the circular restaurant appeared to move at exactly 1 inch
> per second, relative to the fixed ground.
>
> Therefore, what was the diameter of the restaurant?

90 min x 60 sec/min x 1 inch/sec / Pi, about 143 feet

--
D.

men...@mindspring.com
http://sentient.home.mindspring.com/dan/

Steve Sosensky

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Jun 29, 1998, 3:00:00 AM6/29/98
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On Sat, 27 Jun 1998 22:35:50 +0100, "David J. Bodycombe"
<body...@dial.pipex.com> wrote:

>An easy one for a bit of light relief:
>
>I had dinner tonight in the only revolving restaurant in New York, in the
>Marriott Hotel in Broadway.
>
>It took 90 minutes to do one complete revolution, and a point on the outside
>circumference of the circular restaurant appeared to move at exactly 1 inch
>per second, relative to the fixed ground.
>
>Therefore, what was the diameter of the restaurant?
>

Spoiler


143.2394487827 feet.

1 inch per second is 60 inches or 5 feet per minute.
90 minutes to rotate gives circumference of 450 feet.

Diameter = C / pi = 143.2394487827 feet

Peter Foster

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Jul 9, 1998, 3:00:00 AM7/9/98
to
in rec.puzzles, "David J. Bodycombe" <body...@dial.pipex.com> wrote:

>An easy one for a bit of light relief:
>
>I had dinner tonight in the only revolving restaurant in New York, in the
>Marriott Hotel in Broadway.
>
>It took 90 minutes to do one complete revolution, and a point on the outside
>circumference of the circular restaurant appeared to move at exactly 1 inch
>per second, relative to the fixed ground.
>
>Therefore, what was the diameter of the restaurant?
>

I actually did this some years ago, when I took my (now) wife to
dinner at the local revolving restaurant. While waiting for the food
to arrive I did a quick measurement and calculation to determine the
diameter of the restaurant. I didn't have a ruler or a watch, so the
estimate was a bit rough (so I also did a quick estimate of the error
bounds). Then I asked the waiter for the diameter of the restaurant.
And absolutely _nobody_ there knew (damn).

______________________________________________________________
Peter Foster This sig is dedicated to all those who
Spam protection ON did not dedicate their sigs to themselves.

Saul Vibranovski

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Jul 15, 1998, 3:00:00 AM7/15/98
to

Peter Foster <pfoster...@pcug.org.au> wrote in article
<35a487a3...@newshost.pcug.org.au>...


> in rec.puzzles, "David J. Bodycombe" <body...@dial.pipex.com> wrote:
>
> >An easy one for a bit of light relief:
> >
> >I had dinner tonight in the only revolving restaurant in New York, in
the
> >Marriott Hotel in Broadway.
> >
> >It took 90 minutes to do one complete revolution, and a point on the
outside
> >circumference of the circular restaurant appeared to move at exactly 1
inch
> >per second, relative to the fixed ground.
> >
> >Therefore, what was the diameter of the restaurant?
> >
> I actually did this some years ago, when I took my (now) wife to
> dinner at the local revolving restaurant. While waiting for the food
> to arrive I did a quick measurement and calculation to determine the
> diameter of the restaurant. I didn't have a ruler or a watch, so the
> estimate was a bit rough (so I also did a quick estimate of the error
> bounds). Then I asked the waiter for the diameter of the restaurant.
> And absolutely _nobody_ there knew (damn).
>

I found the aswer as 6.77 meters - is it correct ?

Saul Vibranovski
Spam protection ON


Jon Velapoldi

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Jul 23, 1998, 3:00:00 AM7/23/98
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Saul Vibranovski (svi...@domain.com.br) wrote:


: Peter Foster <pfoster...@pcug.org.au> wrote in article

Actually, I found the answer to be:

90*60 (convert to seconds) *1 inch/sec (to determine the distance the
outer piece takes in one revolution) /pi (to figure out the diameter in
inches)

or:

1718.667338539247 inches, or roughly

143.24 feet or roughly

43.659 meters

--

Jon

ast...@glue.umd.edu

http://www.glue.umd.edu/~asterix

Graduate Research-type person
Flight Dynamics and Control Laboratory
University of Maryland, College Park

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