I‘m confused about the "50 smaller steel spheres", are they solid (all made from steel)? OR similar like the big shpere, which means made from 0.8in thick steel and water in the core?
Any idea? Thanks!
Unfortunately, the best answer I have is that it is either one or the other. I guessed solid since they didn't say anything about the interiors of the small balls being filled with water, but who knows?
Suppose you have a scale model of Neopia. The model is a perfect sphere. The diameter of the sphere is exactly 41 inches, and is constructed of solid steel, exactly 0.8 inches thick. Inside the sphere, there are 50 smaller steel spheres, each exactly 2 inches in diameter, and the rest of the sphere is filled up with water.
50 smaller steel spheres sounds like solid steel
as earlier it got mentioned it's a perfect sphere with a steel outer sphere and a water/steel ball filled inner sphere
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plantgirl
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Wed 3 Feb, 2010 08:21 pm
I didn't take into consideration the thickness of the steel...thanks!
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puzzle
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Wed 3 Feb, 2010 08:24 pm
@wertyiu102,
From the solution on previous page, tt seems no matter the smallers are solid or not, the rounded answer will be the same?.....
Well, what do you know - it does appear that the rounded answer is the same whether the small balls are solid or filled with water. I get a difference of about .41 pounds.
And you can even assume the small spheres are hollow with vacuum inside, and it will still round to the same number. So, all that concern over nothing.
That was my first thought regarding the configuration. It looked like they might be saying the small balls were like the large one, made with 0.8 inch thick steel. Then they said the rest of the large ball was filled with water, but didn't say what was in the little ones, so my immediate inclination was to think they were empty.
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Acorna
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Thu 4 Feb, 2010 02:42 am
hmm I got a 5 digit answer that adds up to 17.
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wertyiu102
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Thu 4 Feb, 2010 08:36 pm
ohhh.. heehee, I read it wrong.. And that is really cool... So does that mean that it would be like the whole big sphere was solid?
