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tigerpawl
LSU Fan
Can't get there from here.
Member since Dec 2003
17961 posts

Math Riddle: How much string would you add....
Let's say the earth was perfectly round and smooth, and you ran a string all the way around the equator - 25,000 miles. And then your wife comes along and wants the string to sit exactly 1 foot off the ground - all the way around.
Question: how much new string do you add to the original string to make that happen?

Here's the cryptic answer (shhhhh! don't reveal it!): LINK
This post was edited on 7/25 at 6:11 pm


HobbsTheTiger
Ball State Fan
Houston
Member since Sep 2010
106 posts

re: Math Riddle: How much string would you add....
Do you even circumference, bro?


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lsuwontonwrap
LSU Fan
Member since Aug 2012
33972 posts

re: Math Riddle: How much string would you add....
wut


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ZacAttack
Mississippi St. Fan
The Land Mass
Member since Oct 2012
6416 posts

re: Math Riddle: How much string would you add....
Can't I just put all of it in a big container and put the container one foot off the ground.


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PuntBamaPunt
Vanderbilt Fan
Member since Nov 2010
9918 posts

re: Math Riddle: How much string would you add....
I'd tell her to get her arse back in the kitchen and make me dinner.


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OneMoreTime
SMU Fan
Florida Gulf Coast Fan
Member since Dec 2008
60487 posts

re: Math Riddle: How much string would you add....
I'm not married. Next question.


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ags01
Texas A&M Fan
Member since Mar 2006
3877 posts

re: Math Riddle: How much string would you add....
Is this actually a riddle?


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Karnac
LSU Fan
Colorado
Member since Aug 2010
278 posts

re: Math Riddle: How much string would you add....
C= 25000 = 2*PI*R ==> R=25000/(2*PI)

C' = 2*PI*(25000/(2*PI)+1)

Calculate the radius, add 1, recalculate Circumference. Subtract C'-C

Oops. Correction as noted: Convert 1' increment to 1/5280 miles.
This post was edited on 7/25 at 6:22 pm


Spock's Eyebrow
LSU Fan
Member since May 2012
12300 posts

re: Math Riddle: How much string would you add....
The surprising thing is that the answer is independent of the size of the sphere.


tigerpawl
LSU Fan
Can't get there from here.
Member since Dec 2003
17961 posts

re: Math Riddle: How much string would you add....
quote:

The surprising thing is that the answer is independent of the size of the sphere.
Ahhhh.... I see you've been there and done that. Works for basketballs too....


RDOtiger
LSU Fan
Zachary
Member since Oct 2013
1071 posts

re: Math Riddle: How much string would you add....
Approximately 25,004' ?


tigerpawl
LSU Fan
Can't get there from here.
Member since Dec 2003
17961 posts

re: Math Riddle: How much string would you add....
quote:

Approximately 25,004' ?
refer to the OP link for the "cryptic answer"... How much new string would you add to the original 25,000 mile string?
This post was edited on 7/25 at 6:18 pm


lsufan251875
LSU Fan
Member since Jul 2008
3159 posts

re: Math Riddle: How much string would you add....
quote:

C= 25000 = 2*PI*R ==> R=25000/(2*PI)

C' = 2*PI*(25000/(2*PI)+1)

Calculate the radius, add 1, recalculate Circumference. Subtract C'-C



Forgot to change your units.


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SundayFunday
LSU Fan
Member since Sep 2011
9261 posts

re: Math Riddle: How much string would you add....
quote:

C= 25000 = 2*PI*R ==> R=25000/(2*PI)

C' = 2*PI*(25000/(2*PI)+1)

Calculate the radius, add 1, recalculate Circumference. Subtract C'-C




You should do some major conversions there or that wont make sense.


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Spock's Eyebrow
LSU Fan
Member since May 2012
12300 posts

re: Math Riddle: How much string would you add....
quote:

Ahhhh.... I see you've been there and done that. Works for basketballs too....


It's really quite unintuitive.


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iAmBatman
USA Fan
The Batcave
Member since Mar 2011
10990 posts

re: Math Riddle: How much string would you add....
Miles and feet homie. Change your units


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Chicken
USA Fan
Jackassistan
Member since Aug 2003
16690 posts

re: Math Riddle: How much string would you add....
6.28 feet


Spock's Eyebrow
LSU Fan
Member since May 2012
12300 posts

re: Math Riddle: How much string would you add....
quote:

C= 25000 = 2*PI*R ==> R=25000/(2*PI)

C' = 2*PI*(25000/(2*PI)+1)

Calculate the radius, add 1, recalculate Circumference. Subtract C'-C


You lose points for plugging in a numerical diameter and talking about radii.

ETA: And I lose points for mixing up diameter and circumference.
This post was edited on 7/25 at 6:33 pm


tigerpawl
LSU Fan
Can't get there from here.
Member since Dec 2003
17961 posts

re: Math Riddle: How much string would you add....
quote:

6.28 feet
Chicken FTW!! Who started the rumor that Chickens have small brains?
This post was edited on 7/25 at 6:24 pm


SundayFunday
LSU Fan
Member since Sep 2011
9261 posts

re: Math Riddle: How much string would you add....
Also known as 2Pi


or TWO PIES
This post was edited on 7/25 at 6:23 pm


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