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

It is currently 19 Apr 2014, 14:55

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

It takes machine A x hours to manufacture a deck of cards

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5253
Followers: 21

Kudos [?]: 110 [0], given: 0

GMAT Tests User Reviews Badge
It takes machine A x hours to manufacture a deck of cards [#permalink] New post 09 Nov 2006, 20:47
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
It takes machine A x hours to manufacture a deck of cards that machine B can manufacture in 1/x hours. If machine A operates alone for y hours and is then joined by machine B until 100 decks are finished, in terms of x and y, for how long will the two machines operate simultaneously?

Anybody??
VP
VP
Joined: 28 Mar 2006
Posts: 1391
Followers: 1

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

GMAT Tests User
Re: PS WORK [#permalink] New post 09 Nov 2006, 20:53
GMATT73 wrote:
It takes machine A x hours to manufacture a deck of cards that machine B can manufacture in 1/x hours. If machine A operates alone for y hours and is then joined by machine B until 100 decks are finished, in terms of x and y, for how long will the two machines operate simultaneously?

Anybody??


(100x-y)(x^2+1)/x^2

i ll explain if this is right...
VP
VP
User avatar
Joined: 21 Aug 2006
Posts: 1026
Followers: 1

Kudos [?]: 14 [0], given: 0

GMAT Tests User
 [#permalink] New post 10 Nov 2006, 03:39
tennis_ball wrote:
(100x - y)/(x^2 + 1)


I got the same anwer..

A takes x hours/deck
B takes 1/x hours/deck

in 1 hour, A completes 1/x decks
in 1 hour, B completes x decks
in 1 hour, A+B complete (1+x^2)/x decks

number of decks completed by A in y hours = y/x
number of decks left by the time B joined A = 100 - y/x = (100x-y)/x

Number of hours A and B worked together = ((100x-y)/x)/((1+x^2)/x)

= (100x-y)/(1+x^2)
_________________

The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.

  [#permalink] 10 Nov 2006, 03:39
    Similar topics Author Replies Last post
Similar
Topics:
New posts It takes machine A x hours to manufacture a deck of cards cool_jonny009 3 05 Feb 2006, 20:53
New posts It takes machine A x hours to manufacture a deck of cards alimad 2 28 Sep 2006, 16:19
New posts It takes machine A x hours to manufacture a deck of cards abhi_ferrari 2 26 Aug 2007, 19:30
Popular new posts 9 Experts publish their posts in the topic It takes machine A 'x' hours to manufacture a deck of cards sjayasa 10 10 Jun 2010, 05:23
Popular new posts 8 Experts publish their posts in the topic Machine A currently takes x hours to complete a certain job. superpus07 22 22 Nov 2012, 12:24
Display posts from previous: Sort by

It takes machine A x hours to manufacture a deck of cards

  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®.