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

It is currently 18 Sep 2014, 00:07

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:
Director
Director
avatar
Joined: 27 Jun 2005
Posts: 517
Location: MS
Followers: 2

Kudos [?]: 11 [0], given: 0

GMAT Tests User
It takes machine A x hours to manufacture a deck of cards [#permalink] New post 05 Feb 2006, 20:53
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 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, for how long will the two machines operate simultaneously?

a (100y – x)/x2 + 1

b (100x – y)/x2 + 1

c (100y – x3 – x)/x2 + 1

d (100y – x2y – y)/x2 + 1

e 100x/x2 + 1
VP
VP
avatar
Joined: 21 Sep 2003
Posts: 1071
Location: USA
Followers: 3

Kudos [?]: 31 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Feb 2006, 21:00
b?

Rate of A = 1/x
Rate of B = x

Work done by A in y hrs = y*1/x
Let z be the time that both A & B operate and finally complete the job

Total work = Work done by A in yhrs + Work done by A&B in z

100 = y/x + z (1/x+x)

100x = y + z (1+x^2)

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

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

- Bernard Edmonds

Manager
Manager
avatar
Joined: 19 Jul 2005
Posts: 67
Location: Atlanta
Followers: 1

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

 [#permalink] New post 06 Feb 2006, 08:33
100 = y/x + z (1/x+x)

Why is it y/x and not x/y?

Thanks.
Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

Kudos [?]: 20 [0], given: 0

GMAT Tests User
 [#permalink] New post 06 Feb 2006, 08:57
A produces ONE deck in X hours. So in Y hours it will produce Y/X decks.
  [#permalink] 06 Feb 2006, 08:57
    Similar topics Author Replies Last post
Similar
Topics:
10 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
13 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
It takes machine A x hours to manufacture a deck of cards abhi_ferrari 2 26 Aug 2007, 19:30
It takes machine A x hours to manufacture a deck of cards GMATT73 2 09 Nov 2006, 20:47
It takes machine A x hours to manufacture a deck of cards alimad 2 28 Sep 2006, 16:19
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®.