It is currently 18 Oct 2017, 02:50

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

The energy an animal must expend to move uphill is

Author Message
TAGS:

Hide Tags

Manager
Joined: 21 Aug 2008
Posts: 90

Kudos [?]: 101 [3], given: 0

The energy an animal must expend to move uphill is [#permalink]

Show Tags

07 Jun 2009, 23:45
3
KUDOS
30
This post was
BOOKMARKED
00:00

Difficulty:

55% (hard)

Question Stats:

63% (01:36) correct 37% (02:02) wrong based on 1917 sessions

HideShow timer Statistics

The energy an animal must expend to move uphill is proportional to its body weight, whereas the animal’s energy output available to perform this task is proportional to its surface area. This is the reason that small animals, like squirrel, can run up a tree trunk almost as fast as they can move on level ground, whereas large animals tend to slow down when they are moving uphill.

Which one of the following is an assumption on which the explanation above depends?

(A) The amount of energy needed to move uphill is no greater for large animals that it is for small animals.
(B) Small animals can move more rapidly than large animals can.
(C) The ratio of surface area to body weight is smaller in large animals than it is in small animals.
(D) There is little variation in the ratio of energy output to body weight among animals.
(E) The amount of energy needed to run at a given speed is proportional to the surface area of the running animal.

Source: LSAT
[Reveal] Spoiler: OA

_________________

"The highest result of education is tolerance."

Last edited by broall on 21 Sep 2017, 08:08, edited 1 time in total.
Reformatted question

Kudos [?]: 101 [3], given: 0

Director
Joined: 21 Dec 2009
Posts: 582

Kudos [?]: 831 [10], given: 20

Concentration: Entrepreneurship, Finance
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 11:23
10
KUDOS
1
This post was
BOOKMARKED
I answered the question using ratio:
let ratio for large animals = S/E
Ratio for small animals = s/e
option C: S/E < s/e.........when inverted looks like this:
E/S > e/s........ that is:
energy expended per unit space (for large animals) > that for small animals...
tallies with the stimulus and is thus the CORRECT answer.
_________________

KUDOS me if you feel my contribution has helped you.

Kudos [?]: 831 [10], given: 20

Manager
Joined: 24 Jan 2010
Posts: 152

Kudos [?]: 70 [1], given: 14

Location: India
Schools: ISB
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 07:30
1
KUDOS
I will also go with C for same reason....
_________________

_________________
If you like my post, consider giving me a kudos. THANKS!

Kudos [?]: 70 [1], given: 14

Director
Joined: 21 Dec 2010
Posts: 624

Kudos [?]: 278 [1], given: 51

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

11 May 2011, 22:59
1
KUDOS
let ratio for large animals = S/E
Ratio for small animals = s/e
option C: S/E < s/e.........when inverted looks like this:
E/S > e/s........ that is:
energy expended per unit space (for large animals) > that for small animals...
tallies with the stimulus

thats the kind of representation i was looking for , Got C in
3:00 min
_________________

What is of supreme importance in war is to attack the enemy's strategy.

Kudos [?]: 278 [1], given: 51

Manager
Joined: 25 Mar 2013
Posts: 58

Kudos [?]: 30 [1], given: 52

WE: Project Management (Telecommunications)
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

30 Aug 2013, 04:04
1
KUDOS
I chose C.
It clearly answers the question: bigger body weight means more energy output is needed to move uhill. Lower surface area means lower energy output. So in combination, this means slower uphill movement.

A is wrong. IMO, it weakens the conclusion. Because if energy amount is the same, then larger animals should be faster due to bigger surface area.
B looks irrelevant to me
D looks again irrelevant since the ratio of energy output to BW is not discussed in the question stem
E provides additional information which does not contribute to the logic of the author.
and it also talks about running while we are interested about moving uphill

Kudos [?]: 30 [1], given: 52

Director
Joined: 23 May 2008
Posts: 801

Kudos [?]: 83 [0], given: 0

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 00:11
tough question..i think its btwn B and C, leaning towards B

Kudos [?]: 83 [0], given: 0

Manager
Joined: 30 Mar 2009
Posts: 248

Kudos [?]: 196 [0], given: 1

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 02:20
IMO C

The energy an animal must expend to move uphill is proportional to its body weight, whereas the animal’s energy output available to perform this task is proportional to its surface area. This is the reason that small animals, like squirrel, can run up a tree trunk almost as fast as they can move on level ground, whereas large animals tend to slow down when they are moving uphill.
Which one of the following is an assumption on which the explanation above depends?
(A) The amount of energy needed to move uphill is no greater for large animals that it is for small animals --> counterfact
(B) Small animals can move more rapidly than large animals can --> it's not about the speed of large animals to small animals, it's about speed of each in uphill in compared with each' speed in flat ground
(C) The ratio of surface area to body weight is smaller in large animals than it is in small animals -->the best. Because such ratio of large animals is not equal to that of small animals, large animals can;t remain its speed when moving uphill as can small animals when moving uphill
(D) There is little variation in the ratio of energy output to body weight among animals --> no influence
(E) The amount of energy needed to run at a given speed is proportional to the surface area of the running animal -->not qualified enough to be basis of the argument

Kudos [?]: 196 [0], given: 1

Senior Manager
Joined: 15 Jan 2008
Posts: 280

Kudos [?]: 49 [0], given: 3

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 03:19
Why B ?

IMO c shud be answer.. as the per logic above..

Kudos [?]: 49 [0], given: 3

Manager
Joined: 24 May 2009
Posts: 103

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

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 03:26
I'll go with C.

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

Director
Joined: 03 Jun 2009
Posts: 782

Kudos [?]: 900 [0], given: 56

Location: New Delhi
WE 1: 5.5 yrs in IT
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 03:27
I also vote for C.

B is out, since in the argument its mentioned that :
jainu wrote:
This is the reason that small animals, like squirrel, can run up a tree trunk almost as fast as they can move on level ground, whereas large animals tend to slow down when they are moving uphill.

We don't have any comparison of how these animals perform on level ground. The comparison is only for uphill.
_________________

Kudos [?]: 900 [0], given: 56

Director
Joined: 05 Jun 2009
Posts: 808

Kudos [?]: 373 [0], given: 106

WE 1: 7years (Financial Services - Consultant, BA)
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 09:43
Straightaway C..

Answer can be prephased before even seeing the choices.

--
(1:10)
_________________

Consider kudos for the good post ...
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html

Kudos [?]: 373 [0], given: 106

Director
Joined: 23 May 2008
Posts: 801

Kudos [?]: 83 [0], given: 0

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

08 Jun 2009, 14:03
Neochronic wrote:
Why B ?

IMO c shud be answer.. as the per logic above..

Im just skeptical about C because it could be that the surface/body ratio could be bigger on smaller animals. You could assume either way

Kudos [?]: 83 [0], given: 0

Manager
Joined: 21 Aug 2008
Posts: 90

Kudos [?]: 101 [0], given: 0

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

09 Jun 2009, 08:30
Thanks Minheequang . OA is C
_________________

"The highest result of education is tolerance."

Kudos [?]: 101 [0], given: 0

Senior Manager
Joined: 05 Apr 2007
Posts: 255

Kudos [?]: 93 [0], given: 1

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

13 Jun 2009, 23:05
The answer is ofcourse.....But I o see one more flaw in the argument...While talking about the energy required and available, the direction goes to the speed....Which lead me to E initially..Can someone pls explain why E will not be credible...
_________________

Choose Life

Kudos [?]: 93 [0], given: 1

Manager
Joined: 27 Feb 2010
Posts: 106

Kudos [?]: 434 [0], given: 14

Location: Denver
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 08:52
it should be C

Kudos [?]: 434 [0], given: 14

Director
Joined: 25 Aug 2007
Posts: 927

Kudos [?]: 1503 [0], given: 40

WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain
Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 11:35
IMO C.

@gmatbull,

You must have done good DS
_________________

Tricky Quant problems: http://gmatclub.com/forum/50-tricky-questions-92834.html
Important Grammer Fundamentals: http://gmatclub.com/forum/key-fundamentals-of-grammer-our-crucial-learnings-on-sc-93659.html

Kudos [?]: 1503 [0], given: 40

Manager
Joined: 16 Apr 2008
Posts: 88

Kudos [?]: 17 [0], given: 7

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 12:27
Guessed C... but really tough one.. mine was a pure lucky guess

Kudos [?]: 17 [0], given: 7

Intern
Joined: 16 Feb 2010
Posts: 28

Kudos [?]: 12 [0], given: 0

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 14:04

Kudos [?]: 12 [0], given: 0

VP
Joined: 17 Feb 2010
Posts: 1476

Kudos [?]: 756 [0], given: 6

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 14:06
good question and good explanation by gmatbull

Kudos [?]: 756 [0], given: 6

Intern
Joined: 26 Jul 2009
Posts: 40

Kudos [?]: 4 [0], given: 4

Re: The energy an animal must expend to move uphill is [#permalink]

Show Tags

27 Apr 2010, 15:14
should be c

Kudos [?]: 4 [0], given: 4

Re: The energy an animal must expend to move uphill is   [#permalink] 27 Apr 2010, 15:14

Go to page    1   2   3   4    Next  [ 61 posts ]

Display posts from previous: Sort by