reproducing from gmattutor group) Two walls face each other : Quant Question Archive [LOCKED]
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# reproducing from gmattutor group) Two walls face each other

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Manager
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reproducing from gmattutor group) Two walls face each other [#permalink]

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31 Jan 2004, 01:19
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

(reproducing from gmattutor group)

Two walls face each other at a certain distance x. A ladder 12m long lies at the bottom of the first wall and rests at the second wall. Another ladder 8m long lies at the bottom of the second wall and rests at the first wall. The two ladders intersect at a point 5m above the ground level (ground is flat between the two walls).

What is the distance x between the two walls?
Manager
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31 Jan 2004, 04:12
Couldnt get it, how abt the choices, lets see if we can do backsolving.
SVP
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31 Jan 2004, 09:04
I am unabale to crack it. Dont you think that at what point from one wall does the ladder meet should be given? Any clues... anyone.
Intern
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31 Jan 2004, 11:20
If the answer choices are given, the answer could be figured out...

How abt answr choices
Manager
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31 Jan 2004, 12:40
I dont have any answer choices.
Director
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31 Jan 2004, 13:39
As the gap approaches 8 m, the ladders would approach meeting on the ground.

As the gap approaches 0 m long, they ladders approach meeting 8m up

If we assume that the progression of the difference is continuous and arithmetic (I do not know if this is a valid assumption!), we can figure it out this way.

I'm still working on it.
Director
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31 Jan 2004, 15:11
My research shows that this problem can be solved with Newton's method.

My research also shows that this problem can be solved in about an hour using Heron's law.

My intuition tells me that this problem isn't relevant to the GMAT.
Manager
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31 Jan 2004, 15:26
and my research shows that this problem is relevent for those taking GMAT on Mars. What a problem is this. Damn it spoiled the weekend.
Manager
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31 Jan 2004, 16:13
Manager
Joined: 26 Dec 2003
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Location: India
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31 Jan 2004, 16:19
Those who have already taken the GMAT, did u guys came across this type of questions. My God, who is going to remember the complicated formulas in this question.
31 Jan 2004, 16:19
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# reproducing from gmattutor group) Two walls face each other

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