It is currently 22 Jun 2017, 05:29

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In the late nineteenth century, the archaeologist Charles

Author Message
TAGS:

### Hide Tags

Current Student
Joined: 24 Nov 2012
Posts: 176
Concentration: Sustainability, Entrepreneurship
GMAT 1: 770 Q50 V44
WE: Business Development (Internet and New Media)
In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

26 Sep 2013, 03:18
6
KUDOS
3
This post was
BOOKMARKED
00:00

Difficulty:

95% (hard)

Question Stats:

31% (02:34) correct 69% (02:00) wrong based on 654 sessions

### HideShow timer Statistics

In the late nineteenth century, the archaeologist Charles Warren discovered a new way to explore otherwise inaccessible areas, using vertical shafts leading to horizontal tunnels deep beneath the surface. These tunnels led directly to those areas. Based on Warren's discovery, Zachi Zweig, a rising star in the archaeological scene, has concluded that similar shafts may be dug on shores in proximity to sunken archeological artifacts, leading to tunnels beneath the sea floor allowing easy access to those artifacts.

What is the hidden assumption underlying Prof. Zweig's hypothesis?

A) The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.

E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.

OE to follow

Press Kudos If you like the question
[Reveal] Spoiler: OA

_________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

http://www.manhattangmat.com/blog/index.php/author/cbermanmanhattanprep-com/ - This is worth its weight in gold

Economist GMAT Test - 730, Q50, V41 Aug 9th, 2013
Manhattan GMAT Test - 670, Q45, V36 Aug 11th, 2013
Manhattan GMAT Test - 680, Q47, V36 Aug 17th, 2013
GmatPrep CAT 1 - 770, Q50, V44 Aug 24th, 2013
Manhattan GMAT Test - 690, Q45, V39 Aug 30th, 2013
Manhattan GMAT Test - 710, Q48, V39 Sep 13th, 2013
GmatPrep CAT 2 - 740, Q49, V41 Oct 6th, 2013

GMAT - 770, Q50, V44, Oct 7th, 2013
My Debrief - http://gmatclub.com/forum/from-the-ashes-thou-shall-rise-770-q-50-v-44-awa-5-ir-162299.html#p1284542

Intern
Joined: 28 May 2010
Posts: 4
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

26 Sep 2013, 04:57
Ok Hidden assumption - looking at simple definition of assumption - its some thing taken for granted - so lets look at the options and see what will fit the case here -

A)The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
ok - looks like a good reason to believe that the tunnels are actually possible under the sea - hold
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
nothing to do with the argument
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
ok - so what ??
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.
Same info as the argument - not helpful
E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.
ok - so what does - does not help us with a assumption

So - A remaining - re read it and it looks quite good
IMO - A
_________________

Aiming for 770!

Intern
Joined: 12 May 2013
Posts: 18
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

26 Sep 2013, 08:17
Imo C

If the tunnels in sea are hopelessly deep then it may not be accessible, thus destroying the conclusion.

Sent from my GT-N7105 using Tapatalk 2
Manhattan GMAT Instructor
Joined: 30 Apr 2012
Posts: 800
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

26 Sep 2013, 23:10
1
KUDOS
Expert's post
Transcendentalist wrote:
In the late nineteenth century, the archaeologist Charles Warren discovered a new way to explore otherwise inaccessible areas, using vertical shafts leading to horizontal tunnels deep beneath the surface. These tunnels led directly to those areas. Based on Warren's discovery, Zachi Zweig, a rising star in the archaeological scene, has concluded that similar shafts may be dug on shores in proximity to sunken archeological artifacts, leading to tunnels beneath the sea floor allowing easy access to those artifacts.

What is the hidden assumption underlying Prof. Zweig's hypothesis?

A) The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.

E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.

OE to follow

Press Kudos If you like the question

This question is a bit awkward as it's not a great representation of a GMAT question (it looks like it's from the Economist?)

Anyway, as the prior posts indicate, removing 3 of the 5 options is relatively easy (very common on CR questions) and we are left with 2 options that both seem to be possible answers, A&C. On Critical Reasoning, you want to get rid of the garbage (obviously wrong answers) quickly so you can spend time working on the 2 possible answers.

Let's dig into A&C. The premise of the argument presents an approach of digging deep vertical shafts connected to tunnels that will reach previously unaccessible areas. The conclusion is that the same method can be used to reach sunken artifacts (under water). What is the necessary assumption between A & C? Let's try negating...

Negated A - The specific weight of water and earth are not similar, thus creating different pressure on the tunnel's ceiling.
If there is different pressure between the tunnels under ground and under sea and there is more pressure under sea, might the under sea tunnels collapse and prevent reaching the sunken artifacts? Very possibly.
Negated C - Tunnels beneath the seafloor and tunnels beneath dry land do not share the same vertical distance from the surface.
Does the distance to the surface impact the ability to dig shafts connected to tunnels? The premise states that the underground tunnels are "deep" under the earth so it appears that depth doesn't impact the ability to use this technique.

Normally with negation we get the destruction of the conclusion. I wouldn't say that negated 'A' destroys the conclusion, but it seems to do much more harm to the conclusion than negated 'C', so we will choice answer choice A.

KW
_________________

Kyle Widdison | Manhattan GMAT Instructor | Utah

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7438
Location: Pune, India
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

27 Sep 2013, 04:20
2
KUDOS
Expert's post
Transcendentalist wrote:
In the late nineteenth century, the archaeologist Charles Warren discovered a new way to explore otherwise inaccessible areas, using vertical shafts leading to horizontal tunnels deep beneath the surface. These tunnels led directly to those areas. Based on Warren's discovery, Zachi Zweig, a rising star in the archaeological scene, has concluded that similar shafts may be dug on shores in proximity to sunken archeological artifacts, leading to tunnels beneath the sea floor allowing easy access to those artifacts.

What is the hidden assumption underlying Prof. Zweig's hypothesis?

A) The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.

E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.

OE to follow

Press Kudos If you like the question

There are certainly a lot of issues in this question - the argument says that shafts may be dug, leading to tunnels. So it seems like the tunnels already exist and can be accessed easily - all you have to do is dig deep shafts to access them. If that is the case, the specific weights of water and earth don't come in the picture. The tunnels are there - you just access them by digging a hole at some point. Whatever the weight above them, they are already supporting it.
Another case is where you dig deep shafts and then dig in some way to get access to the tunnels. If that is the case, you need to be careful about the weight above the tunnel you are making. But you may still be able to make them thicker - just like you can make shafts longer or shorter if the depth of sea shore tunnels are different from the depth of dry land tunnels. So neither A nor C is an assumption. If one of them is an assumption, the other becomes an assumption too.
The only reason I may pick A instead of C is that C says 'same vertical distance' and A says 'similar specific weight'. So C is more binding and hence not necessarily true. Also digging deeper may be easier than withstanding higher weight.
Another possibility is that the question implies that due to the higher specific weight, the tunnels may already be blocked at places - for that we need a lot more technical know how of how the tunnels are identified etc which is outside the scope of this argument.

All in all, I wouldn't worry about this question. As Kyle said, it is not representative of actual GMAT questions.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Manager
Joined: 23 May 2013
Posts: 126
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

10 Oct 2013, 17:47
can the moderator remove the questions which are not GMAT? why to have non-gmat question on GMAT Club..its ironical.
_________________

“Confidence comes not from always being right but from not fearing to be wrong.”

Manhattan GMAT Instructor
Joined: 30 Apr 2012
Posts: 800
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

12 Oct 2013, 06:01
1
KUDOS
Expert's post
I agree that it is a bit ironic that we have so many GMAT questions that don't come from the GMAT itself but there is a good reason for it. There are only so many GMAT questions available for our review that we wouldn't have nearly as many helpful discussions if we were limited to actual GMAT questions. The 'GMAT' questions from other sources are for the most part very representative of an actual GMAT question but now and again you will find examples that aren't super close to the real thing. In those cases you consider the source and move on

KW

Posted from my mobile device
_________________

Kyle Widdison | Manhattan GMAT Instructor | Utah

Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile

Director
Joined: 17 Dec 2012
Posts: 550
Location: India
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

04 Jun 2017, 18:54
Transcendentalist wrote:
In the late nineteenth century, the archaeologist Charles Warren discovered a new way to explore otherwise inaccessible areas, using vertical shafts leading to horizontal tunnels deep beneath the surface. These tunnels led directly to those areas. Based on Warren's discovery, Zachi Zweig, a rising star in the archaeological scene, has concluded that similar shafts may be dug on shores in proximity to sunken archeological artifacts, leading to tunnels beneath the sea floor allowing easy access to those artifacts.

What is the hidden assumption underlying Prof. Zweig's hypothesis?

A) The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.

E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.

OE to follow

Press Kudos If you like the question

We can easily eliminate choices B,D and E.

Between A and C, we can eliminate C because, the science there is easy and we can guess that it is not because of the same vertical distance, given the information in the passage. There is more science in choice A and it is likely that same pressure on the tunnel's ceiling is needed. So I would chose A.
_________________

Srinivasan Vaidyaraman
Sravna
http://www.sravnatestprep.com

Classroom and Online Coaching

Manager
Joined: 28 Jan 2017
Posts: 55
Re: In the late nineteenth century, the archaeologist Charles [#permalink]

### Show Tags

14 Jun 2017, 16:44
Transcendentalist wrote:
In the late nineteenth century, the archaeologist Charles Warren discovered a new way to explore otherwise inaccessible areas, using vertical shafts leading to horizontal tunnels deep beneath the surface. These tunnels led directly to those areas. Based on Warren's discovery, Zachi Zweig, a rising star in the archaeological scene, has concluded that similar shafts may be dug on shores in proximity to sunken archeological artifacts, leading to tunnels beneath the sea floor allowing easy access to those artifacts.

What is the hidden assumption underlying Prof. Zweig's hypothesis?

A) The specific weight of water and earth are similar, thus creating the same pressure on the tunnel's ceiling.
B) Otherwise inaccessible sunken archeological artifacts can be reached using new technological advancements in the world of marine robotics.
C) Tunnels beneath the seafloor and tunnels beneath dry land share the same vertical distance from the surface.
D) Shafts similar to those dug by the celebrated Warren may be dug on the sea-shore, enabling archaeologists easy access to otherwise inaccessible sunken archeological artifacts.

E) Otherwise inaccessible terrain can be reached below the surface using vertical shafts.

OE to follow

Press Kudos If you like the question

In my opinion this option "A" contains more of a scientific information "specific weight" which means nothing to the people who do not know what does this term exactly mean. Now even if the specific weight is different, how does it matter? The material of shaft will simply be made of the material that can withstand the pressure exerted by the matter with high specific weight.

Option "C" seems more plausible to me as it is more related to the topic under discussion in general.
Re: In the late nineteenth century, the archaeologist Charles   [#permalink] 14 Jun 2017, 16:44
Similar topics Replies Last post
Similar
Topics:
6 A scholar discovered an unlabeled nineteenth-century 5 10 Apr 2017, 20:34
4 When the nineteenth-century German bacteriologist Robert Koch 3 04 Apr 2016, 08:26
1 During the nineteenth century, the French academy of art was 3 20 Feb 2017, 21:39
Tocqueville, a nineteenth-century writer known for his study 9 04 Jan 2014, 11:18
Tocqueville, a nineteenth-century writer known for his study 10 08 Mar 2012, 06:17
Display posts from previous: Sort by