NeoPets Riddles (Lenny Conundrums) and Answers Here

I think we are all wrong by a few grams, need to verify something.

yeah to find radius thats how I did it.

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@yellowpiggy,

Now did your work differ from mine? Because you can see that all of mine is hard derived from the data provided Razz

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@yellowpiggy,

I didnt do it as a cylinder but I do have to admit it has been many years since i did this kinda maths at school

well i have to rush off to work or ill be late goodluck all guess we will know in a week who gets the maths gold star lolol

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@Fluffykins,

*crosses fingers and hopes*

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Hmm, well I've actually never seen that method (x^2+y^2=r^2) before, most probably because I had a bizarre English/Russian styled education and we use something else.

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Oh no nevermind I have seen this method, just written differently XDD

Katana it is a loop but it just has two different cross sections. If you cut it with the circle facing us you see, obviously, the circle shape, but it you turn it around so that the curved side faces us the cross section is a rectangle or square (in this case).

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@yellowpiggy,

I don't get what you say, I said the hoop is made of a rectagular shaped tube, isn't that what it means ?

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@yellowpiggy,

I knew you'd recognize it... as it's standard format

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@krazykatana,

I dunno if pictures work on here but look at this

http://img259.imageshack.us/img259/687/len.th.png

http://img259.imageshack.us/img259/687/len.png

Basically a cylinder can be cut as follows, lengths ways (the longer side and letter A) or width ways(letter B). I thin in the question it means that the letter A version cross section of the cyclinder forms a square, i.e the length of the cylinder/hoop is 2.5. (unless of course it means that the CS is a square of 2.5 area).

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well after a few verifications I now have a totally different answer 29808

btw jcrboy what you call inner circle isn't the inner circle, 32 is not center to hoop it's center to shelve, you need to use 29.5 instead of 32

very likely to be that it is square-shaped btw, having the A cross-section being a square of 2.5 cm would make no sense, shelves mesure up to 138 cm

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@krazykatana,

But the 138cm is just a cord for the 2D circle; it doesn't go through the circle it goes across it.

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@yellowpiggy,

for the A section to have a square form of 2.5 cm, it would be extremelly small and thick

how can something 138 cm wide fit into a circle of only 2.5 cm in lenght.

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wow -- i have a totally different answer than anything that's been posted, but i'm pretty sure my logic and math check out. pretty good at these sorts of things.
there are NO squares involved in the cross sectional area.
perhaps this site you help people out: http://whistleralley.com/torus/torus.htm
the cross section of a hoop is a circle. you need to use that, and the length of the shelves (as a chord) to calculate the R and r for the final equation.

i got a 5 digit number, with the sum of the digits being 23.

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Well 29808 seems like my final answer( unfortunatly not what I entered)

used full pi as it was used in #298 which was the last time pi was used in any LC

Basically what differs form the first few answers posted by me and will is the idea of inner and outer circles, introduced by jcr.

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Eh, I think my answer's wrong too but I'm not all too bothered anymore. The last time I did a maths question I spent ages checking my answer using different methods and although I got it right I didn't do it fast enough to get a trophy >.>

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just came back after like 5 years not playing but I was good enough to get trophies at that time (lol man I must have been fairly good when I was a teenager), math questions are the only ones I have any chance to answer honestly.

pretty sure with the 29808 tho, we'll see next week I guess.

The main problem with this question doesn't seem to be so much that it's hard but that the question is way too vague about the cross-section part.

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Yes indeed, and I hope it will be another one of those easy questions so I can get another trophy XD

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Ouch... I had to rework my problem, even though I had submitted...

I needed to edit the fact that r-y=32... it's actually r-y=29.5

With that edit, it changes my answer to 27509

I feel like a dummy for such an elementary mistake... I got excited and sloppy when I thought I was on the right track

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@jcrboy,

you sure about that ? just made it with your method but the new numbers and I come up with 29808 which is exactly the answer I got following my method.

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@krazykatana,

I'll double check my math 1 more time

-_-'

I love math some times... other times I hate it

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NeoPets Riddles (Lenny Conundrums) and Answers Here

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