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

It is currently 18 Apr 2014, 03:15

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

Problems with Work/Rate questions

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
Joined: 29 Dec 2010
Posts: 33
Followers: 0

Kudos [?]: 2 [0], given: 3

Problems with Work/Rate questions [#permalink] New post 07 Apr 2011, 09:36
Hi guys, I’m having tremendous problems studying for rate and work questions... I’ve been studying for around 8 months... and have been able to spin around these questions but know I need to absolutely know them..
I have read the rate/Work section in the MGMAT words translations,, but It only helped me on rates.. speed etc... cars moving towards and away... but in work questions I am a mess. Im doing rate and work questions here on the gmatclub.com forums.... the rate questions I know im getting the jist of them... but I can hardly do any work questions.... I am in serious trouble on this... I cant afford to get a very simple work problem in the first 1-10 question ...

Can anyone recommend me a way to study the work questions?? apart from the words trnslations.. it only covers very little the work problems..

regards
Manhattan GMAT Discount CodesKaplan GMAT Prep Discount CodesGMAT Pill GMAT Discount Codes
Manager
Manager
Joined: 17 Jan 2011
Posts: 243
Followers: 1

Kudos [?]: 21 [0], given: 4

GMAT Tests User
Re: Problems with Work/Rate questions [#permalink] New post 09 Apr 2011, 14:59
1) Use unitary method for simple problems
e.g If A can complete a unit of work in 10 days, how many days can A do two units of work working at half the efficiency?
1 unit in 10 days
2 units in x days
i.e. x = 20
with full efficiency - 20 days
with 1/2 efficiency - y days
so logically, it should be double the time i.e. 40 days

2) Slightly complex problems - use
(1/x + 1/y = 1/Time) Below example explains how this formula can be derived.

e.g. If A can do something in 3 hours and B can do the same in 2, how long would it take them while working together?
A can do 1 unit in 3 hours
A can do x units in 1 hours
So x = 1/3

Similarly, B can do 1 unit in 2 hours
B can do y units in 1 hours
So y = 1/2

In one hour, total work = work done by A + work done by B
i.e. 1/3 + 1/2
=> 5/6

Again, unitary method
5/6th work can be done in 1 hour
1 work (i.e. full) can be done in x hours
i.e. x = 6/5

Instead of using this method, just plug in the values in the formula.
_________________

Good Luck!!!

***Help and be helped!!!****

GMAT Forum Moderator
User avatar
Status: Accepting donations for the mohater MBA fund
Joined: 05 Feb 2008
Posts: 1860
Location: United States
Concentration: Healthcare, Economics
Schools: Ross '14 (M)
GMAT 1: 710 Q48 V38
GMAT 2: Q V
GPA: 3.54
WE: Accounting (Manufacturing)
Followers: 50

Kudos [?]: 348 [0], given: 234

GMAT ToolKit User GMAT Tests User Premium Member Reviews Badge
Re: Problems with Work/Rate questions [#permalink] New post 09 Apr 2011, 19:33
You should practice word translations and word problems. Practice moving from words to equations and from equations to words.

MGMAT and Veritas both have a book on this subject.

MGMAT:
http://www.amazon.com/Word-Translations ... =8-1-spell
MGMAT ebook:
http://www.amazon.com/Translations-Prep ... =8-2-spell

Veritas:
http://www.veritasprep.com/gmat-prep-books/
(the individual Veritas book is not available on Amazon)
_________________

Strategy Discussion Thread | Strategy Master | GMAT Debrief| Please discuss strategies in discussion thread. Master thread will be updated accordingly. | GC Member Write Ups

Re: Problems with Work/Rate questions   [#permalink] 09 Apr 2011, 19:33
    Similar topics Author Replies Last post
Similar
Topics:
New posts work-rate problem FN 5 03 Oct 2005, 11:59
New posts 1 Work and Rate GMAT Questions - Word Problems Master List timetrader 4 17 Jun 2009, 06:25
New posts 3 Experts publish their posts in the topic Problems with Work/Rate questions marijose 8 11 Feb 2011, 07:20
Display posts from previous: Sort by

Problems with Work/Rate questions

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: bagdbmba, WaterFlowsUp



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®.