Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 21 May 2013, 11:40
Customize  |  Hide

Search
Register
New posts
Unanswered

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

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Director
Director
User avatar
Joined: 27 Jun 2005
Posts: 518
Location: MS
Followers: 1

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

GMAT Tests User
It takes machine A x hours to manufacture a deck of cards [#permalink] New post 05 Feb 2006, 21:53
00:00

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, 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
Joined: 21 Sep 2003
Posts: 1079
Location: USA
Followers: 2

Kudos [?]: 17 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Feb 2006, 22:00
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
Joined: 19 Jul 2005
Posts: 68
Location: Atlanta
Followers: 1

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

 [#permalink] New post 06 Feb 2006, 09:33
100 = y/x + z (1/x+x)

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

Thanks.
Director
Director
Joined: 13 Nov 2003
Posts: 811
Location: BULGARIA
Followers: 1

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

GMAT Tests User
 [#permalink] New post 06 Feb 2006, 09:57
A produces ONE deck in X hours. So in Y hours it will produce Y/X decks.
  [#permalink] 06 Feb 2006, 09:57
    Similar topics Author Replies Last post
Similar
Topics:
 New posts It takes machine A x hours to manufacture a deck of cards alimad 2 28 Sep 2006, 17:19
New posts It takes machine A x hours to manufacture a deck of cards GMATT73 2 09 Nov 2006, 21:47
New posts It takes machine A x hours to manufacture a deck of cards abhi_ferrari 2 26 Aug 2007, 20:30
New posts 4 EXPERTS_POSTS_IN_THIS_TOPIC It takes machine A 'x' hours to manufacture a deck of cards sjayasa 8 10 Jun 2010, 06:23
Popular new posts 3 EXPERTS_POSTS_IN_THIS_TOPIC Machine A currently takes x hours to complete a certain job. superpus07 12 22 Nov 2012, 13:24
Display posts from previous: Sort by

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

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com