It is currently 14 Dec 2017, 15:03

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If John takes 12 minutes to eat x hotdogs, how many seconds will it ta

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 20 May 2014
Posts: 12

Kudos [?]: 30 [0], given: 0

Reviews Badge
If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 27 Sep 2015, 15:28
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

83% (00:56) correct 18% (01:14) wrong based on 120 sessions

HideShow timer Statistics

If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12
[Reveal] Spoiler: OA

Last edited by ENGRTOMBA2018 on 27 Sep 2015, 15:50, edited 1 time in total.
Renamed the topic

Kudos [?]: 30 [0], given: 0

1 KUDOS received
Current Student
avatar
B
Joined: 20 Mar 2014
Posts: 2672

Kudos [?]: 1789 [1], given: 797

Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 27 Sep 2015, 15:53
1
This post received
KUDOS
1
This post was
BOOKMARKED
pmklings wrote:
If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12


For questions like these, it is always beneficial to assume certain values for x and z. Let x=12 and z=24. You have 1 min/hotdog and thus for 24 hotdogs, you need 24 minutes = 24*60=1440 seconds.

Analyse the options:

a. 720z/x = 1440, keep.

b. 12x/z = 6 seconds. Eliminate.

c. x/12z = 1/24 seconds. Eliminate.

d. 720/xz = 2.5 seconds. Eliminate.

e. xz/12 = 24 seconds. Eliminate.

A is the correct answer.

Kudos [?]: 1789 [1], given: 797

Expert Post
2 KUDOS received
EMPOWERgmat Instructor
User avatar
P
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 10391

Kudos [?]: 3691 [2], given: 173

Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: 340 Q170 V170
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 27 Sep 2015, 17:37
2
This post received
KUDOS
Expert's post
Hi pmklings,

TESTing VALUES (the approach used by Engr2012) works perfectly on these types of questions. You can solve it mathematically too...

Algebraically, this is just a 'rate' question. From the first sentence, we know that it takes 12 minutes to eat X hotdogs. 12 minutes = 12(60) = 720 seconds. Thus...

720/X = the time (in seconds) that it takes to eat 1 hotdog.

The prompt asks us for the amount of time that it takes to eat Z hotdogs, so we just have to multiply the given rate by Z...

Final Answer:
[Reveal] Spoiler:
A


GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free
  Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

***********************Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!***********************

Kudos [?]: 3691 [2], given: 173

Expert Post
1 KUDOS received
SVP
SVP
User avatar
G
Joined: 11 Sep 2015
Posts: 1910

Kudos [?]: 2750 [1], given: 364

Location: Canada
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 28 Sep 2015, 08:41
1
This post received
KUDOS
Expert's post
Engr2012 and Rich have nicely demonstrated the two methods (Algebraic and Input-Output) for solving a question type I call Variables in the Answer Choices.
If you'd like more information on these approaches, we have some free videos:
- Variables in the Answer Choices - http://www.gmatprepnow.com/module/gmat- ... /video/933
- Tips for the Algebraic Approach - http://www.gmatprepnow.com/module/gmat- ... /video/934
- Tips for the Input-Output Approach - http://www.gmatprepnow.com/module/gmat- ... /video/935

Cheers,
Brent
_________________

Brent Hanneson – Founder of gmatprepnow.com

Image

Kudos [?]: 2750 [1], given: 364

1 KUDOS received
Manager
Manager
User avatar
G
Joined: 13 Apr 2013
Posts: 218

Kudos [?]: 87 [1], given: 669

Location: India
Concentration: International Business, Operations
Schools: ISB '19
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member CAT Tests
If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 28 Sep 2015, 09:51
1
This post received
KUDOS
1
This post was
BOOKMARKED
pmklings wrote:
If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12



My solution:

John's rate (r) = x hot dogs/12 minutes or x hot dogs/12*60 seconds

So, the equation becomes

z = (x/720)*T or T = 720z/x

Answer is A

_________________

"Success is not as glamorous as people tell you. It's a lot of hours spent in the darkness."

Kudos [?]: 87 [1], given: 669

Current Student
avatar
Joined: 10 Oct 2013
Posts: 18

Kudos [?]: 6 [0], given: 114

Location: India
Concentration: International Business, Technology
GMAT 1: 620 Q39 V35
GMAT 2: 710 Q47 V40
WE: Sales (Computer Hardware)
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 03 Oct 2015, 03:15
pmklings wrote:
If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12


You can apply the unitary method by using the information given in the question here to find how many seconds John will take to eat 1 hotdog. If John eats x hotdogs in 12 mins (12*60secs= 720secs), the time he will take to eat 1 hotdog will be 720/x secs. Therefore, the time John will take to eat z hotdogs will be : 720/x * z = 720z/x i.e. option A

Kudos [?]: 6 [0], given: 114

Senior Manager
Senior Manager
User avatar
Joined: 31 Mar 2016
Posts: 406

Kudos [?]: 85 [0], given: 197

Location: India
Concentration: Operations, Finance
GMAT 1: 670 Q48 V34
GPA: 3.8
WE: Operations (Commercial Banking)
GMAT ToolKit User Premium Member
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 08 Jun 2016, 10:05
Work = Rate * time
z = (x/720) * time
time = 720(z/x)

720 = 12 minutes * 60 = 720 seconds

Kudos [?]: 85 [0], given: 197

Director
Director
avatar
G
Joined: 07 Dec 2014
Posts: 859

Kudos [?]: 291 [0], given: 16

If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 08 Jun 2016, 16:34
john's rate=x/12 min=x/720 sec
john's time=z/(x/720)=720z/x sec

Kudos [?]: 291 [0], given: 16

Senior Manager
Senior Manager
User avatar
Joined: 18 Jan 2010
Posts: 257

Kudos [?]: 174 [0], given: 9

Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 08 Jun 2016, 21:50
pmklings wrote:
If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12


x hot dogs are eaten in 12 minutes

1 hot dogs is eaten in (12/x) minutes

z hot dogs are eaten in (12/x)*z minutes

(12/x)*z minutes = (720z/x) seconds.

A is the answer.

Kudos [?]: 174 [0], given: 9

Expert Post
Target Test Prep Representative
User avatar
S
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1940

Kudos [?]: 1018 [0], given: 3

Location: United States (CA)
Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta [#permalink]

Show Tags

New post 29 Nov 2017, 17:10
pmklings wrote:
If John takes 12 minutes to eat x hotdogs, how many seconds will it take him to eat z hot dogs, assuming he continues to eat at the same rate?

a. 720z/x

b. 12x/z

c. x/12z

d. 720/xz

e. xz/12


John’s rate is x/12 hot dogs per minute, so it takes him z/(x/12) = 12z/x minutes to eat z hot dogs and 12z/x minutes = 12z/x * 60 = 720z/x seconds.

Answer: A
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Kudos [?]: 1018 [0], given: 3

Re: If John takes 12 minutes to eat x hotdogs, how many seconds will it ta   [#permalink] 29 Nov 2017, 17:10
Display posts from previous: Sort by

If John takes 12 minutes to eat x hotdogs, how many seconds will it ta

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


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.