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

It is currently 25 Jul 2014, 08:23

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

How long did it take Betty to drive nonstop on a trip from

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 26 Feb 2011
Posts: 45
Followers: 1

Kudos [?]: 6 [0], given: 1

How long did it take Betty to drive nonstop on a trip from [#permalink] New post 28 Feb 2011, 11:25
How long did it take Betty to drive nonstop on a trip from her home to Denver,Colorado?
1) If Betty`s average speed for the trip had been 1,5 times as fast, the trip would have taken 2 hours
2) Betty`s average speed for the trip was 50 miles per hour
Manager
Manager
User avatar
Status: I am Midnight's Child !
Joined: 04 Dec 2009
Posts: 148
WE 1: Software Design and Development
Followers: 1

Kudos [?]: 25 [0], given: 11

Re: How long did it take [#permalink] New post 28 Feb 2011, 13:18
Madelaine88 wrote:
How long did it take Betty to drive nonstop on a trip from her home to Denver,Colorado?
1) If Betty`s average speed for the trip had been 1,5 times as fast, the trip would have taken 2 hours
2) Betty`s average speed for the trip was 50 miles per hour


IMO A
From (1),
d/s -d/1.5s = 2
d = 6s
We know d = t*s
Hence t =6 So, Sufficient
from (2) .
s= 50 So, Insufficient
_________________

Argument : If you love long trips, you love the GMAT.
Conclusion : GMAT is long journey.

What does the author assume ?
Assumption : A long journey is a long trip.


Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
User avatar
Joined: 19 Nov 2010
Posts: 92
Followers: 5

Kudos [?]: 112 [0], given: 9

Re: How long did it take [#permalink] New post 28 Feb 2011, 15:28
Agree with the answer. It does not matter for DS, but its d/1.5s = 2. t = 3.

BC
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1692
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 30

Kudos [?]: 275 [0], given: 36

GMAT Tests User Premium Member Reviews Badge
Re: How long did it take [#permalink] New post 28 Feb 2011, 18:15
The answer is A :

Let x be the average speed and t be the time taken during trip, so from (1) we have :

1.5(x) * 2 = x*t
=> t = 3, sufficient.

From (2), all we have is x = 50, so not sufficient.

Regards,
Subhash
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 28 Feb 2011
Posts: 7
Followers: 0

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

Re: How long did it take [#permalink] New post 28 Feb 2011, 20:17
Statement 1.since the distance is equal:
V1T1=V2T2
V1T1=1.5V1*(T1-2)
T1=1.5T1-3
T1=6

Statement 1 is sufficient

Statement 2:Ony average velocity is given so nothing can be concluded.Hence Ststement 2 is insufficient.
Senior Manager
Senior Manager
avatar
Joined: 29 Jan 2011
Posts: 385
Followers: 0

Kudos [?]: 22 [0], given: 87

GMAT Tests User
Re: How long did it take [#permalink] New post 03 Oct 2011, 21:45
subhashghosh wrote:
The answer is A :

Let x be the average speed and t be the time taken during trip, so from (1) we have :

1.5(x) * 2 = x*t
=> t = 3, sufficient.

From (2), all we have is x = 50, so not sufficient.

Regards,
Subhash

Statement 1 says that if Betty' speed has been 1 1/2 times as fast , the trip would have taken 2 hours...

Doesnt it mean Is 'S' was original speed new speed = s + 1 1/2 S = 5/2 S and not 1.5 S????
Manager
Manager
avatar
Status: Essaying
Joined: 27 May 2010
Posts: 156
Location: Ghana
Concentration: Finance, Finance
Schools: Cambridge
GMAT 1: 690 Q47 V37
GPA: 3.9
WE: Accounting (Education)
Followers: 1

Kudos [?]: 7 [0], given: 8

GMAT ToolKit User GMAT Tests User
Re: How long did it take [#permalink] New post 04 Oct 2011, 04:03
Statement 2 is not enough. Gives us only one variable.
Statement one gives us enough to solve with an if then scenario.
Answer A
Manager
Manager
avatar
Status: Essaying
Joined: 27 May 2010
Posts: 156
Location: Ghana
Concentration: Finance, Finance
Schools: Cambridge
GMAT 1: 690 Q47 V37
GPA: 3.9
WE: Accounting (Education)
Followers: 1

Kudos [?]: 7 [0], given: 8

GMAT ToolKit User GMAT Tests User
Re: How long did it take [#permalink] New post 04 Oct 2011, 04:07
Statement 2 is not enough. Gives us only one variable.
Statement one gives us enough to solve with an if then scenario.
Answer A
Senior Manager
Senior Manager
avatar
Joined: 29 Jan 2011
Posts: 385
Followers: 0

Kudos [?]: 22 [0], given: 87

GMAT Tests User
Re: How long did it take [#permalink] New post 26 Oct 2011, 22:34
Can someone please comment if this is right approach?


Let 'S' be Speed and 'D' be distance.


st1)Original Equation: S * (t+2) = D
New Equation(If betty's speed was 1 1/2 times as fast the trip would have taken 2 hours) => (S + 3/2 S) * 2 = D

Doesnt it mean Is 'S' was original speed new speed = s + 1 1/2 S = 5/2 S and not 1.5 S????

S * (t+2) = 5/2 S * 2

Thus 3S = St

Thus t = 3


Hence A


Is this correct? I see people write 1.5 S and not 5/2 S in the new equation .... So is my approach correct or wrong ??? PLease comment :?: :?: :?:
Senior Manager
Senior Manager
avatar
Joined: 29 Jan 2011
Posts: 385
Followers: 0

Kudos [?]: 22 [0], given: 87

GMAT Tests User
Re: How long did it take [#permalink] New post 18 Nov 2011, 06:15
siddhans wrote:
Can someone please comment if this is right approach?


Let 'S' be Speed and 'D' be distance.


st1)Original Equation: S * (t+2) = D
New Equation(If betty's speed was 1 1/2 times as fast the trip would have taken 2 hours) => (S + 3/2 S) * 2 = D

Doesnt it mean Is 'S' was original speed new speed = s + 1 1/2 S = 5/2 S and not 1.5 S????

S * (t+2) = 5/2 S * 2

Thus 3S = St

Thus t = 3


Hence A


Is this correct? I see people write 1.5 S and not 5/2 S in the new equation .... So is my approach correct or wrong ??? PLease comment :?: :?: :?:


Can someone please reply? How do we know "as fast" means s + 3/2 s or 1.5 s???
Re: How long did it take   [#permalink] 18 Nov 2011, 06:15
    Similar topics Author Replies Last post
Similar
Topics:
4 Experts publish their posts in the topic How long did it take Betty to drive nonstop on a trip from h Bunuel 4 04 Feb 2014, 00:39
3 Experts publish their posts in the topic How long did it take Betty to drive nonstop on a trip from eybrj2 9 14 Mar 2012, 14:19
3 Experts publish their posts in the topic How long did it take Betty to drive nonstop on a trip from lionheart187 11 04 Jun 2008, 03:03
How long did it take betty to drive nonstop on a trip from alimad 6 04 May 2008, 08:46
How long did it take Betty to drive nonstop on a trip from gablaze23 4 01 Aug 2007, 07:20
Display posts from previous: Sort by

How long did it take Betty to drive nonstop on a trip from

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.