NeoPets Riddles (Lenny Conundrums) and Answers Here

@jjbuttcrack,

Ok, so maybe this is the formula...

143.75-40.82=102.93
102.93 x 15 = 1543.95

143.75 is 2300/16 and is the amount of string used per revolution
40.82 is circumference

So Im thinking we should deduct the 40.82 cm per revolution since that is a given. 102.93 is (to my brain anyway) the extra string used per revolution as it is stretched down the pole.

1 Reply

@Leopard,

if we did tightly wrap it around the pole the string would go around 56.3 times. :S

0 Replies

guys guys guys -- look at my first post (#3 on 606) -- i show that it canNOT be tightly wrapped. and that means that the thickness of the rope is not necessary to solve it. the thickness would not matter at all. really, its the tightness of the spiral that will define the length of the pipe the rope will cover.

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can't we try it out manually

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@K311Y,

Why multiply by 15?

1 Reply

So the pole is 102.93 cm long per revolution?

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i was thinking that too kelly -- but it somehow seemed wrong to me... but if you got there as well, maybe there's something to it.

1 Reply

@jjbuttcrack,

ok, i submitted it.

0 Replies

@starleogirl09,

I multiplied by 15 because that is how many spaces are between each coil. I drew a diagram. The string starts at the very top and ends at the very bottom, so you dont really have any extra string for those revolutions.

1 Reply

Are we taking into account that each time the string goes around the pole, it would be more than the actual circumference because it is loosely wrapped?

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i got either 11 or 177 but, no decimals, round with the closest

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@K311Y,

I get it--thanks!

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@warhammer11,

warhammer11 wrote:

i believe the string is coiled around the cylinder kinda of like the problem on this page :http://mathforum.org/library/drmath/view/55156.html

I think the approach of rolling it out into a triangle is exactly right. We are given L, the length of the string, D, the diameter of the cylinder, and N, the number of turns, and asked to solve for P*N.

Use the Pythagorean theorem for the relationship between the sides of a right triangle and out pops the answer.

3 Replies

@edstock,

umm.......... DOes p= pi or pythagoream

1 Reply

@edstock,

Yep, I used that and just got my answer. But mines RLY big. Is urs?

1 Reply

@edstock,

See, I thought that too, but there is no pitch to plug into that formula.

1 Reply

@wertyiu102,

wertyiu102 wrote:

umm.......... DOes p= pi or pythagoream

P = pitch, the height of each revolution of the string around the coil or cylinder. P*N is just the entire height of the cylinder or coil.

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i don't like those holdon! you have to wait 87654321 seoncd before you post again messages

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@K311Y,

Quote:

See, I thought that too, but there is no pitch to plug into that formula.

We don't need to know the pitch, we need to solve for the product P*N, but not by multiplying P and N. We use the lengths of the other two sides and calculate the length of the vertical side using the Pythagorean Theorem.

1 Reply

@Firestar624,

Quote:

Yep, I used that and just got my answer. But mines RLY big. Is urs?

Very big - the wrappings don't use much of the length of the string, as the height is so much bigger than the diameter.

0 Replies

NeoPets Riddles (Lenny Conundrums) and Answers Here

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