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try this riddle!

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Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DWF formats, Design Review, AutoCAD 360, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=6936
Printed Date: 20.Jun.2025 at 19:44


Topic: try this riddle!
Posted By: Roska
Subject: try this riddle!
Date Posted: 23.Nov.2011 at 13:13

The box and ladder riddle.

Place a 1 by 1 meter box (represented by a square on your 2D drawing) on the floor, against the wall (represented by a horizontal and a vertical line say 8 meters long) Place a 5 meter long ladder on the floor and against the wall so that the ladder touches the corner of the box. How high does the ladder reach up the wall? 



Replies:
Posted By: John Connor
Date Posted: 24.Nov.2011 at 01:07
It reaches only as high as it has to.

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"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>

Posted By: CAD library
Date Posted: 25.Nov.2011 at 20:39
It reaches only as high as it has to??? is it the answer???

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Posted By: CAD library
Date Posted: 25.Nov.2011 at 20:45
not less than 5m.

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Posted By: John Connor
Date Posted: 26.Nov.2011 at 00:22
Maybe I'm missing the point of posting a riddle to a CAD Help site.

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"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>

Posted By: heinsite
Date Posted: 26.Nov.2011 at 08:00
There are two answers to this question because of how you can lean the ladder against the box, floor, and wall.  Either the ladder reaches 1.26m above the floor, or 4.84m above the floor. 

But John is correct.  This is not a CAD problem  Short of brute force trial and error one can only solve this using algebra and trigonometry.  And even then, it's not a trivial solution.


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Dave Hein, P.E.
Hawaii District Engineer
Kona International Airport
AutoCAD Certified Professional
Autodesk Expert Elite

Posted By: CAD library
Date Posted: 26.Nov.2011 at 18:23
:) I agree

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