Rail system

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rahulg83: Legendary Member; Posts: 575; Joined: Tue Nov 04, 2008 2:58 amFollowed by: 4 members; Location: India; Thanked: 18 times; GMAT Score:710

by rahulg83 » Sat May 02, 2009 2:43 am

Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.

serving a given population is usually five times more efficient in a European city than it is in an American city

serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

will usually be five times more efficient in a European city than one serving a comparable population in an American city

in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city

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Source: Beat The GMAT — Sentence Correction | Sat May 02, 2009 2:43 am

Vemuri: Legendary Member; Posts: 682; Joined: Fri Jan 16, 2009 2:40 amFollowed by: 1 member; Thanked: 32 times

Re: Rail system

by Vemuri » Sat May 02, 2009 3:11 am

rahulg83 wrote:Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.

A. serving a given population is usually five times more efficient in a European city than it is in an American city

B. serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

C. will usually be five times more efficient in a European city than one serving a comparable population in an American city

D. in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

E. that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city

IMO D

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abhinav85: Master | Next Rank: 500 Posts; Posts: 179; Joined: Mon Dec 29, 2008 4:41 am; Thanked: 2 times

by abhinav85 » Sat May 02, 2009 5:13 am

IMO A.

I think A is the best answer because it is showing the proper diffrence between X and Y.

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kanha81: Master | Next Rank: 500 Posts; Posts: 431; Joined: Sat Jan 10, 2009 9:32 amFollowed by: 1 member; Thanked: 16 times

Re: Rail system

by kanha81 » Sat May 02, 2009 10:22 am

Vemuri wrote:
rahulg83 wrote:Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.

A. serving a given population is usually five times more efficient in a European city than it is in an American city

B. serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

C. will usually be five times more efficient in a European city than one serving a comparable population in an American city

D. in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

E. that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city
IMO D

Vemuri,

Why do you say [spoiler][D][/spoiler]? If you look closely, all answers except [spoiler][A][/spoiler] speak in"future tense" "will". The present sentence has been presented in "present tense", so the OA ought to be in "present tense".

IMO [spoiler][A][/spoiler]. What is OA?

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rahulg83: Legendary Member; Posts: 575; Joined: Tue Nov 04, 2008 2:58 amFollowed by: 4 members; Location: India; Thanked: 18 times; GMAT Score:710

Re: Rail system

by rahulg83 » Sat May 02, 2009 11:56 am

kanha81 wrote:
Vemuri wrote:
rahulg83 wrote:Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.

A. serving a given population is usually five times more efficient in a European city than it is in an American city

B. serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

C. will usually be five times more efficient in a European city than one serving a comparable population in an American city

D. in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

E. that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city
IMO D
Vemuri,

Why do you say [spoiler][D][/spoiler]? If you look closely, all answers except [spoiler][A][/spoiler] speak in"future tense" "will". The present sentence has been presented in "present tense", so the OA ought to be in "present tense".

IMO [spoiler][A][/spoiler]. What is OA?

OA is D. The reason A and B are not the answer because 'there' in the non-underlined part of the sentence can refer to European cities only (logically obvious) and in this choice this is the ambiguity.

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cramya: Legendary Member; Posts: 2467; Joined: Thu Aug 28, 2008 6:14 pmFollowed by: 11 members; Thanked: 331 times

by cramya » Sun May 03, 2009 3:00 am

I would go with D

Most parallel choice
Logical comparison between systems before and after the "than"

a commuter rail system than will a system

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NKB: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Tue Aug 10, 2010 2:28 am

by NKB » Thu Oct 07, 2010 3:32 am

I am not able to understand why C is not the Ans. Can anyone please explain in detail the error in C?

Thanks in advance

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Yanat: Senior | Next Rank: 100 Posts; Posts: 77; Joined: Sat Sep 25, 2010 9:45 pm

by Yanat » Thu Oct 07, 2010 8:45 am

IMO it is D.

NKB, the correct expression is 'X more efficient than Y' where X and Y are parallel. But in C we are not comparing parallel elements 'five times more efficient in a European city than one' is wrong in 'C'.

commuter rail system more efficient in a European city than in an American city makes more sense. But in C this is not so, we have lot of extra stuff that comes after than and before in an American city.

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NKB: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Tue Aug 10, 2010 2:28 am

by NKB » Thu Oct 07, 2010 10:35 pm

Thanks a lot!

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ansh.kumar: Master | Next Rank: 500 Posts; Posts: 108; Joined: Thu Feb 12, 2009 8:20 am; Thanked: 2 times

by ansh.kumar » Fri Oct 08, 2010 1:31 am

hi,
can anyone tell wats wrong in "A"
thanks

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Ramneet Singh: Senior | Next Rank: 100 Posts; Posts: 68; Joined: Tue Sep 21, 2010 11:24 amFollowed by: 1 member

by Ramneet Singh » Fri Oct 08, 2010 1:48 am

rahulg83 wrote:Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.

serving a given population is usually five times more efficient in a European city than it is in an American city

serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

will usually be five times more efficient in a European city than one serving a comparable population in an American city

in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city

hey whats the source?

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