Discussion in 'The Pub' started by CyberFerret, Apr 20, 2015.
I am enjoying some of the ones I have seen on here... Let me throw this one into the ring:
= length + (4 * circumference)
= 12 + (4 * 4)
=12 + 16
hmmm stuffed that up. Can't be right from a common sense perspective...
I get 20cm. It's interesting how many different ways there are to figure it out, depending on your inclinations.
GTFO and do it in Imperial units John....
Fine. It's about 0.0009941939075797 furlongs. See? Simple.
i'm gonna go with 20 cm, whatever that stands for.
I must be losing my mind...thought I posted...28cm...16+12....maybe I am missing something.
My workings are as follows:
CTRL + T.
A string is wound symmetrically. *hit enter*
Scroll through a few results, see if multiple people are in agreement.
Stumble across a book that has multiple correct and incorrect answers.
Notice all the correct ones are 20cm.
Therefore, answer is 20cm.
It comes as no surprise that this quiz is from like 18 years ago, the internet loves to drag up old stuff and fob it off as new, doesn't it?
identical threads haha. it threw me for a loop too
OK, I think I see the 20cm answer...
Well, they did just change my antidepressant...just chalked it up to an Internet based hallucination...
rod length is pretty important.
12cm rod with 4 wraps gives you 3cm sections
I think if you tried that, you would come up short. Let me illustrate. Imagine the rod length is one metre. Now is it irrelevant ?
I imagine there is a correct mathematical approach to account for the rod length, but it's probably easier to just wrap and measure. A few years back, the honda guys had so much trouble getting the racing authorities to understand the math that calculated the volume of the oval cylinders on the famous NR500, that they resorted to filling them with oil and measuring it, to prove teh displacement was as claimed. Worked a treat.
width = 4 x 4 = 16cm
length = 12cm
diagonal length = ((16^2 + 12^2))^0.5 = 20cm
^^^ yes yes yes. too fast. I be a dumb engineer
I cut my imaginary paper towel tube into 4 smaller tubes and opened them up to 4 rectangles, 4 cm by 3 cm each. I arrange the rectangles so the string runs from one corner diagonally across each of them, revealing a right angle triangle - 3 squared by 4 squared equals 5 squared for each of the rectangles, 5 times 4 rectangles equals 20.
This is the best way of explaining it yet!
That's how I imagined it too because I didn't have 16^2 off the top of my head.