GMAT Question of the Day - Daily to your Mailbox; hard ones only
close

It is currently 18 Oct 2018, 12:02
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel

Warren and Rubin race around an oval track. Warren runs at a uniform

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50000
Premium Member
Top Member of the Month
Warren and Rubin race around an oval track. Warren runs at a uniform  [#permalink]

Show Tags

New post 09 Nov 2015, 23:26
8
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

67% (02:06) correct 33% (02:25) wrong based on 180 sessions

HideShow timer Statistics

Warren and Rubin race around an oval track. Warren runs at a uniform rate of one lap every 7 minutes, and Rubin runs at a uniform rate of one lap every 5 minutes. If they both start at the same time. How many minutes will it take for Rubin to get exactly one lap ahead of Warren.

(A) 12
(B) 13 1/2
(C) 15
(D) 16.7
(E) 17.5
Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Verbal Forum Moderator
User avatar
V
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2082
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: Warren and Rubin race around an oval track. Warren runs at a uniform  [#permalink]

Show Tags

New post 09 Nov 2015, 23:53
2
Warren runs at a rate of 1 lap every 7 mins
Rubin runs at a rate of 1 lap every 5 mins
In 7 mins , Rubin must have completed 2/5th of an additional lap by the time Warren completes Warren's first lap.
Time taken for Rubin to get exactly one lap ahead of Warren = 5/2 * 7 mins = 17.5 mins

Answer E
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Director
Director
User avatar
G
Joined: 20 Feb 2015
Posts: 793
Concentration: Strategy, General Management
Premium Member
Warren and Rubin race around an oval track. Warren runs at a uniform  [#permalink]

Show Tags

New post 10 Nov 2015, 03:56
1
I plugged in the values.

by the the time Rubin completed 3 laps in 15 minutes , Warren completed only 15/7 ~2.1 of the lap

plug in 17.5 and we get 17.5/5 = 3.5 rounds for Rubin and 17.5/7 = 2.5 Rounds for for warren
The difference is thus 1 round so :E 17.5 is the answer
VP
VP
avatar
P
Joined: 07 Dec 2014
Posts: 1104
Warren and Rubin race around an oval track. Warren runs at a uniform  [#permalink]

Show Tags

New post Updated on: 01 Dec 2017, 16:51
2
1
Warren and Rubin race around an oval track. Warren runs at a uniform rate of one lap every 7 minutes, and Rubin runs at a uniform rate of one lap every 5 minutes. If they both start at the same time. How many minutes will it take for Rubin to get exactly one lap ahead of Warren.

(A) 12
(B) 13 1/2
(C) 15
(D) 16.7
(E) 17.5

W runs 1/7, or 5/35, laps per minute
R runs 1/5, or 7/35, laps per minute
R gains 2/35 laps per minute on W
1 lap/(2/35) laps per minute=17.5 minutes
E

Originally posted by gracie on 10 Nov 2015, 15:30.
Last edited by gracie on 01 Dec 2017, 16:51, edited 2 times in total.
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 8449
Premium Member
Re: Warren and Rubin race around an oval track. Warren runs at a uniform  [#permalink]

Show Tags

New post 01 Dec 2017, 07:07
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: Warren and Rubin race around an oval track. Warren runs at a uniform &nbs [#permalink] 01 Dec 2017, 07:07
Print view
First unread post
Display posts from previous: Sort by

Warren and Rubin race around an oval track. Warren runs at a uniform

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, VeritasKarishma, niks18, Bunuel, generis

Search for:


Copyright

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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions