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

It is currently 25 Oct 2014, 20:27

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

Working together, John and Jack can type 20 pages in one

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1102
Followers: 6

Kudos [?]: 136 [0], given: 0

Working together, John and Jack can type 20 pages in one [#permalink] New post 17 Feb 2008, 05:37
1
This post was
BOOKMARKED
Working together, John and Jack can type 20 pages in one hour. They will be able to type 22 pages in one hour if Jack increases his typing speed by 25%. What is the ratio of Jack's normal typing speed to that of John?

1/3

2/5

1/2

2/3

3/5
Manager
Manager
User avatar
Joined: 02 Jan 2008
Posts: 159
Followers: 2

Kudos [?]: 57 [0], given: 0

Re: work [#permalink] New post 17 Feb 2008, 06:29
D
--
Jack: x pages/hr, John: y pages/hr

x/20 + y/20 = 1 = 1.25x/22 + y/22
x:y=2:3
SVP
SVP
avatar
Joined: 28 Dec 2005
Posts: 1593
Followers: 2

Kudos [?]: 75 [0], given: 2

Re: work [#permalink] New post 17 Feb 2008, 07:14
D for me as well.

let a =jacks rate, and b=johns rate

a+b=20

1.25a+b=22

0.25a=2 -->a=8 -->b=12

a/b=8/12=2/3
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1102
Followers: 6

Kudos [?]: 136 [0], given: 0

Re: work [#permalink] New post 17 Feb 2008, 09:19
pmenon wrote:
D for me as well.

let a =jacks rate, and b=johns rate

a+b=20

1.25a+b=22

0.25a=2 -->a=8 -->b=12

a/b=8/12=2/3



oa is d. in this case we use the formula:

time necessary for Jack + time necessary for John = total time

let's consider the formula 1/x + 1/y = total time or xy/(x+y)=total time

in this case we already have the two times: 1/x and 1/y, which are a and b.

is that right? I encounter many problems in approaching work questions.
Re: work   [#permalink] 17 Feb 2008, 09:19
    Similar topics Author Replies Last post
Similar
Topics:
7 Experts publish their posts in the topic Working together, John and Jack can type 20 pages in one hou Barkatis 7 09 Oct 2010, 00:26
18 Experts publish their posts in the topic It takes Jack 2 more hours than Tom to type 20 pages. If Barkatis 15 04 Aug 2010, 18:09
3 secretaries working together can type 36 pages of text in bmwhype2 1 18 Oct 2007, 09:40
1 working together, John and Jack can type 20 pages in 1hr. If grad_mba 3 11 Jun 2007, 19:54
3 typists working together can type 36 pages in 30 minutes. desiguy 5 07 Dec 2005, 06:29
Display posts from previous: Sort by

Working together, John and Jack can type 20 pages in one

  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®.