Find all School-related info fast with the new School-Specific MBA Forum

It is currently 18 Sep 2014, 15:56

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

m07q18

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 21 Mar 2006
Posts: 133
Followers: 3

Kudos [?]: 8 [0], given: 0

m07q18 [#permalink] New post 23 Jul 2008, 04:58
If a lumberjack crew needs to secure a safety zone for cutting down the trees, how far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimeter is minimized? The first tree is the highest one.

1. The height of the first tree is 50m.
2. Currently the distance from the barrier to the top of the tree is 70 meters.

(C) 2008 GMAT Club - m07#18

* Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
* Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
* BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
* EACH statement ALONE is sufficient
* Statements (1) and (2) TOGETHER are NOT sufficient

S1 tells us that the tree, if cut down, will hit the ground no farther than 50 meters away from its origin. It is sufficient as we know that the barrier has to be at least 55 meters away. S2, without the height of the tree, is insufficient.
********************************************************************

We can find the from second one as well.
say hieght of tree is X .
Then X^2 + (X+5)^2 = 70^2

Am I thinking all right ?
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesManhattan GMAT Discount Codes
Intern
Intern
avatar
Joined: 08 Jul 2008
Posts: 14
Followers: 0

Kudos [?]: 1 [0], given: 0

Re: m07/18 [#permalink] New post 23 Jul 2008, 05:05
Yes, your answer is correct if you are considering the first tree longest.
What if the 2nd tree is longer than the 1st tree. Suppose the distance between both the tree is less than the difference between their heights. In that case both the statements are useless and answer is (E).

abhaypratapsingh wrote:
A lumberjack crew needs to secure a safety zone for cutting down the trees. How far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimieter is minimized?

1. The height of the first tree is 50m
2. Currently the distance from the barrier to the top of the tree is 70 meters



* Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
* Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
* BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
* EACH statement ALONE is sufficient
* Statements (1) and (2) TOGETHER are NOT sufficient

S1 tells us that the tree, if cut down, will hit the ground no farther than 50 meters away from its origin. It is sufficient as we know that the barrier has to be at least 55 meters away. S2, without the height of the tree, is insufficient.
********************************************************************

We can find the from second one as well.
say hieght of tree is X .
Then X^2 + (X+5)^2 = 70^2

Am I thinking all right ?
CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 30 Jul 2009, 23:16
The question has been modified. I've updated the first post to reflect the changes.
_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 14 Jun 2009
Posts: 97
Followers: 2

Kudos [?]: 5 [0], given: 9

Re: m07q18 [#permalink] New post 09 Aug 2009, 20:57
just wanted to know what the correct answer then is>>>

coz i marked it as (D), each statement being sufficient on its own...
CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 09 Aug 2009, 23:01
The OA stays the same; it's A.

arvs212 wrote:
just wanted to know what the correct answer then is>>>

coz i marked it as (D), each statement being sufficient on its own...

_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Director
Director
User avatar
Joined: 25 Oct 2008
Posts: 611
Location: Kolkata,India
Followers: 9

Kudos [?]: 173 [0], given: 100

GMAT Tests User
Re: m07q18 [#permalink] New post 18 Sep 2009, 17:39
Quote:
If a lumberjack crew needs to secure a safety zone for cutting down the trees, how far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimeter is minimized? The first tree is the highest one.

The height of the first tree is 50m.
Currently the distance from the barrier to the top of the tree is 70 meters.


Stmt 1 we all know is suff.
Stmt 2:We know here that the first tree is the longest.
So,x^2+x^2=70^2
and so x=ht of the tree can be found out..
IMO: D :?:
_________________

countdown-beginshas-ended-85483-40.html#p649902

CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 22 Sep 2009, 11:38
How did you come up with that equation? What is that equation based on? Yes, we know that the first tree is the longest one. However, we still can't find its height with only that info.

Do you agree?
tejal777 wrote:
Stmt 1 we all know is suff.
Stmt 2:We know here that the first tree is the longest.
So, x^2+x^2=70^2
and so x=ht of the tree can be found out..
IMO: D :?:

_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Director
Director
User avatar
Joined: 24 Aug 2007
Posts: 956
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Followers: 54

Kudos [?]: 711 [0], given: 40

GMAT Tests User
Re: m07q18 [#permalink] New post 30 May 2010, 00:44
Hi,

I second this doubt. In the question we are given the barrier perimeter is minimized. If we place the barrier away more than 5 m then we cant have the minimum perimeter. So, statement 2 is also sufficient. OA should be D.

Please comment.

dzyubam wrote:
How did you come up with that equation? What is that equation based on? Yes, we know that the first tree is the longest one. However, we still can't find its height with only that info.

Do you agree?
tejal777 wrote:
Stmt 1 we all know is suff.
Stmt 2:We know here that the first tree is the longest.
So, x^2+x^2=70^2
and so x=ht of the tree can be found out..
IMO: D :?:

_________________

Want to improve your CR: cr-methods-an-approach-to-find-the-best-answers-93146.html
Tricky Quant problems: 50-tricky-questions-92834.html
Important Grammer Fundamentals: key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 30 May 2010, 23:54
S2 can't be sufficient on its own. Suppose the first tree is not the highest one. If the tree next to it is higher than the first one, it will need a bigger safety zone.
_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

1 KUDOS received
Director
Director
User avatar
Joined: 24 Aug 2007
Posts: 956
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Followers: 54

Kudos [?]: 711 [1] , given: 40

GMAT Tests User
Re: m07q18 [#permalink] New post 31 May 2010, 00:02
1
This post received
KUDOS
I think we already have this condition in the question:

If a lumberjack crew needs to secure a safety zone for cutting down the trees, how far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimeter is minimized? The first tree is the highest one.


dzyubam wrote:
S2 can't be sufficient on its own. Suppose the first tree is not the highest one. If the tree next to it is higher than the first one, it will need a bigger safety zone.

_________________

Want to improve your CR: cr-methods-an-approach-to-find-the-best-answers-93146.html
Tricky Quant problems: 50-tricky-questions-92834.html
Important Grammer Fundamentals: key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 31 May 2010, 00:12
:oops: My bad.

It's not stated in the question stem or S2 that the current position of the barrier follows the rule. We can't construct that equation unless we know exactly that the position of the barrier follows the rules. Moreover, we can't be sure that distance of 70 meters is measured to the tree closes to the barrier.

What do you think?
ykaiim wrote:
I think we already have this condition in the question:

If a lumberjack crew needs to secure a safety zone for cutting down the trees, how far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimeter is minimized? The first tree is the highest one.


dzyubam wrote:
S2 can't be sufficient on its own. Suppose the first tree is not the highest one. If the tree next to it is higher than the first one, it will need a bigger safety zone.

_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Director
Director
User avatar
Joined: 24 Aug 2007
Posts: 956
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Followers: 54

Kudos [?]: 711 [0], given: 40

GMAT Tests User
Re: m07q18 [#permalink] New post 31 May 2010, 00:32
I dont think we need that much reasoning. If I go with your point, then even S1 can't bring the solution.

Lets disect the question stem:
If a lumberjack crew needs to secure a safety zone for cutting down the trees, how far from a given tree should the safety barrier be put up so that it is at least 5 meters away from the danger area, and the barrier perimeter is minimized? The first tree is the highest one.

1. We need to place the barrier at >=5 away from the danger zone.
2. If we have to make the barrier perimeter minimum then, what I understand, the barrier has to be placed at no more than 5m away from danger zone. So, S2 becomes just like S1. So, we can solve for the distance.
_________________

Want to improve your CR: cr-methods-an-approach-to-find-the-best-answers-93146.html
Tricky Quant problems: 50-tricky-questions-92834.html
Important Grammer Fundamentals: key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

Director
Director
User avatar
Joined: 24 Aug 2007
Posts: 956
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Followers: 54

Kudos [?]: 711 [0], given: 40

GMAT Tests User
Re: m07q18 [#permalink] New post 31 May 2010, 21:56
Can anyone explain more on this issue? :?
_________________

Want to improve your CR: cr-methods-an-approach-to-find-the-best-answers-93146.html
Tricky Quant problems: 50-tricky-questions-92834.html
Important Grammer Fundamentals: key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 31 May 2010, 23:31
This is not the best question. We will be rephrasing or replacing it.
_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Director
Director
User avatar
Joined: 24 Aug 2007
Posts: 956
WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Followers: 54

Kudos [?]: 711 [0], given: 40

GMAT Tests User
Re: m07q18 [#permalink] New post 01 Jun 2010, 00:48
Kindly intimate me the rephrased question.

dzyubam wrote:
This is not the best question. We will be rephrasing or replacing it.

_________________

Want to improve your CR: cr-methods-an-approach-to-find-the-best-answers-93146.html
Tricky Quant problems: 50-tricky-questions-92834.html
Important Grammer Fundamentals: key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

CIO
CIO
avatar
Joined: 02 Oct 2007
Posts: 1218
Followers: 87

Kudos [?]: 667 [0], given: 334

GMAT ToolKit User GMAT Tests User
Re: m07q18 [#permalink] New post 01 Jun 2010, 01:29
I will update this thread when the question will be updated.
_________________

Welcome to GMAT Club! :)
Facebook TwitterGoogle+LinkedIn
Want to solve GMAT questions on the go? GMAT Club iPhone app will help.
Please read this before posting in GMAT Club Tests forum
Result correlation between real GMAT and GMAT Club Tests
Are GMAT Club Test sets ordered in any way?

Take 15 free tests with questions from GMAT Club, Knewton, Manhattan GMAT, and Veritas.

Get the best GMAT Prep Resources with GMAT Club Premium Membership

CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 178

Kudos [?]: 948 [0], given: 235

GMAT Tests User Reviews Badge
Re: m07q18 [#permalink] New post 11 Jul 2010, 04:44
:( My answer was E because of this barrier else A was sufficient.

It is a bad question.
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

Re: m07q18   [#permalink] 11 Jul 2010, 04:44
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic M07 q18 teal 6 22 Jun 2012, 04:41
1 m07q18 abhaypratapsingh 16 23 Jul 2008, 04:58
Display posts from previous: Sort by

m07q18

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



cron

GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.