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

It is currently 25 Jul 2014, 03:55

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

Bob ran a 20 mile race. At what time did he finish the race?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
Bob ran a 20 mile race. At what time did he finish the race? [#permalink] New post 06 Mar 2006, 13:41
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Bob ran a 20 mile race. At what time did he finish the race?
1. He started the race at 8:05 am and his average speed for the first 10 miles of the race was 8 miles per hour.

2. He had completed half the amount of running time at 9:20 am and had completed the 80% of running time at 10:05 am.
_________________

Success is my only option, failure is not -- Eminem

Director
Director
avatar
Joined: 23 Jun 2005
Posts: 847
GMAT 1: 740 Q48 V42
Followers: 3

Kudos [?]: 21 [0], given: 1

GMAT Tests User
 [#permalink] New post 06 Mar 2006, 14:14
B. He finished 30% of running time between 9:20AM and 10:05AM.
Therefore, 100% is 2hours and 30minutes. He finished 50% by 9:20, so he must have started at 8:05AM. He arrived at the finish line at 10:35AM.
Intern
Intern
avatar
Joined: 06 Mar 2006
Posts: 37
Followers: 0

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

GMAT Tests User
 [#permalink] New post 06 Mar 2006, 18:50
We dont know at what pace or rate he was running the last 20%. There isn't sufficient information at all. I would go with E
Director
Director
User avatar
Joined: 26 Feb 2006
Posts: 908
Followers: 3

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

GMAT Tests User
Re: DS+ Kaplan [#permalink] New post 06 Mar 2006, 19:47
B.
30% of total time = 45 minuets
20% of total time = (45/3)(2) minuets = 30 minuets.

so the time he finished the race is 10:35.
Manager
Manager
avatar
Joined: 24 Dec 2005
Posts: 95
Followers: 1

Kudos [?]: 2 [0], given: 0

 [#permalink] New post 06 Mar 2006, 23:36
I agree with B since we dont need to know the time required to finish the last 20%. We already know the percent of time at 2 stages. That should suffice. OA please.
Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 07:54
All of you guys are wrong.. give it one more shot!
_________________

Success is my only option, failure is not -- Eminem

Manager
Manager
avatar
Joined: 16 Sep 2005
Posts: 62
Followers: 1

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

 [#permalink] New post 07 Mar 2006, 08:11
bewakoof wrote:
All of you guys are wrong.. give it one more shot!

I am tempted to choose E but again according to Bewakoof this is a wrong answer. OA please!
_________________

Thanks

Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 10:15
MBAHopeful wrote:
bewakoof wrote:
All of you guys are wrong.. give it one more shot!

I am tempted to choose E but again according to Bewakoof this is a wrong answer. OA please!



actually according to Kaplan it is wrong.. Kaplan says it is C..
_________________

Success is my only option, failure is not -- Eminem

Manager
Manager
avatar
Joined: 16 Sep 2005
Posts: 62
Followers: 1

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

 [#permalink] New post 07 Mar 2006, 10:36
bewakoof wrote:
MBAHopeful wrote:
bewakoof wrote:
All of you guys are wrong.. give it one more shot!

I am tempted to choose E but again according to Bewakoof this is a wrong answer. OA please!



actually according to Kaplan it is wrong.. Kaplan says it is C..


Hello Bewakoof,

As I do not have Kaplan, can you please let us know the Kaplan explaination if there is any? I find it rather difficult to believe that the answer is C, but again may be I am ovelooking some minute details.
_________________

Thanks

VP
VP
avatar
Joined: 22 Aug 2005
Posts: 1128
Location: CA
Followers: 1

Kudos [?]: 24 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 10:57
anandsebastin wrote:
B. He finished 30% of running time between 9:20AM and 10:05AM.
Therefore, 100% is 2hours and 30minutes. He finished 50% by 9:20, so he must have started at 8:05AM. He arrived at the finish line at 10:35AM.


I agree. bwk, does Kaplan gives OE in this case?
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 11:52
Look at the attachment.. If that does not work.. I will try to explain it in my own words.

btw.. I did get it wrong.. during my practice tests.. I got 5-6 weird questions like these.. my Math score was 40!
Attachments

GMATClubanswer.doc [100.5 KiB]
Downloaded 94 times

To download please login or register as a user


_________________

Success is my only option, failure is not -- Eminem

Manager
Manager
avatar
Joined: 16 Sep 2005
Posts: 62
Followers: 1

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

 [#permalink] New post 07 Mar 2006, 12:08
bewakoof wrote:
Look at the attachment.. If that does not work.. I will try to explain it in my own words.

btw.. I did get it wrong.. during my practice tests.. I got 5-6 weird questions like these.. my Math score was 40!


Hello again,

It seems I did not understand the explaination.
As I understand the explaination in the case 2) Kaplan has translated the total time required in the equation 3T/10 = 45. In this equation aren't they assuming that the person is running with a constant rate through out his race?

Please comment :!:
_________________

Thanks

Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 12:21
I really dont know. I chose E just like you guys did..

I think the trick lies in understanding "running time".. 80% running time is covered in 9:20 and 50% is covered at a:bb. so we really dont care about the speed.. All we need is the time for our motives..
_________________

Success is my only option, failure is not -- Eminem

Manager
Manager
avatar
Joined: 16 Sep 2005
Posts: 62
Followers: 1

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

 [#permalink] New post 07 Mar 2006, 12:32
bewakoof wrote:
I really dont know. I chose E just like you guys did..

I think the trick lies in understanding "running time".. 80% running time is covered in x:xx and 50% is covered at x:xx.. so we really dont care about the speed.. All we need is the time for our motives..


I guess you are right. If we consider both the cases together, we can see that from 80% of running 50% and 30% runnings are done with the same rate so I think the statistical assumption is the remaining 20% is done with the same rate.

Sorry for keep bugging you guys with my questions. :cry:
_________________

Thanks

VP
VP
avatar
Joined: 22 Aug 2005
Posts: 1128
Location: CA
Followers: 1

Kudos [?]: 24 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 13:15
bewakoof wrote:
Look at the attachment.. If that does not work.. I will try to explain it in my own words.

btw.. I did get it wrong.. during my practice tests.. I got 5-6 weird questions like these.. my Math score was 40!


As per explanation for S2,
"number of minutes he spent running" is known (02:30 hrs).
also we know, he had run for "01:15 hrs" at "09:20" (50% of running time). Why can't we calculate the time when he "begun" race (09:20 - 01:15 = 08:05 hrs).

Explanation says "we do not know when he began running.". I guess we do. Wats your take?
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 13:31
MBAHopeful wrote:
bewakoof wrote:
I really dont know. I chose E just like you guys did..

I think the trick lies in understanding "running time".. 80% running time is covered in x:xx and 50% is covered at x:xx.. so we really dont care about the speed.. All we need is the time for our motives..


I guess you are right. If we consider both the cases together, we can see that from 80% of running 50% and 30% runnings are done with the same rate so I think the statistical assumption is the remaining 20% is done with the same rate.

Sorry for keep bugging you guys with my questions. :cry:


No you are not bugging anybody.. We are all here to learn from each other.. I am still not convinced with Kaplan's answer.. and look at duttsit's response just above this post.. and I think he is right.. If we think like the Kaplan is making us think in ST2.. B should be sufficient..
_________________

Success is my only option, failure is not -- Eminem

Director
Director
avatar
Joined: 24 Oct 2005
Posts: 577
Location: NYC
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 13:32
duttsit wrote:

As per explanation for S2,
"number of minutes he spent running" is known (02:30 hrs).
also we know, he had run for "01:15 hrs" at "09:20" (50% of running time). Why can't we calculate the time when he "begun" race (09:20 - 01:15 = 08:05 hrs).

Explanation says "we do not know when he began running.". I guess we do. Wats your take?


I think you are right.. We dont need St1 if we think the way Kaplan wants us to think.. I hope that I will not run into such difficult questions on my real GMAT!
_________________

Success is my only option, failure is not -- Eminem

Senior Manager
Senior Manager
avatar
Joined: 11 Nov 2005
Posts: 336
Location: London
Followers: 1

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

GMAT Tests User
 [#permalink] New post 07 Mar 2006, 16:18
we do need to know when he started the race. so stat 1 together with stat 2 is essential.


duttsit wrote:
bewakoof wrote:
Look at the attachment.. If that does not work.. I will try to explain it in my own words.

btw.. I did get it wrong.. during my practice tests.. I got 5-6 weird questions like these.. my Math score was 40!


As per explanation for S2,
"number of minutes he spent running" is known (02:30 hrs).
how did you get 2.30 hrs withour knowing the 8.05 start time? so stat1 is essential

also we know, he had run for "01:15 hrs" at "09:20" (50% of running time). you know only with the info from stat1 Why can't we calculate the time when he "begun" race (09:20 - 01:15 = 08:05 hrs).

Explanation says "we do not know when he began running.". I guess we do. Wats your take?
Manager
Manager
avatar
Joined: 20 Feb 2006
Posts: 213
Followers: 1

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

GMAT Tests User
 [#permalink] New post 08 Mar 2006, 18:04
I too think statement II is sufficient to answer the question.
  [#permalink] 08 Mar 2006, 18:04
    Similar topics Author Replies Last post
Similar
Topics:
3 If Danielle ran a race at a constant speed, at what time did fozzzy 3 01 Jun 2013, 01:38
7 Experts publish their posts in the topic Stephanie, Regine, and Brian ran a 20 mile race. Stephanie arps 7 04 Feb 2012, 15:21
12 Experts publish their posts in the topic Stephanie, Regine, and Brian ran a 20 mile race. Stephanie jakolik 13 06 Aug 2010, 00:42
Stephanie, Regine, and Brian ran a 20 mile race. Stephanie GK_Gmat 9 06 Oct 2007, 04:20
Svetlana runs a 20 mile race. At what time did she finish cavanbas 2 19 Aug 2004, 20:21
Display posts from previous: Sort by

Bob ran a 20 mile race. At what time did he finish the race?

  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®.