GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 19 Aug 2019, 22:23

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.

Close

Request Expert Reply

Confirm Cancel

If a group of 5 craftsmen takes 3 hours to finish a job

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Retired Moderator
avatar
V
Joined: 22 Jun 2014
Posts: 1097
Location: India
Concentration: General Management, Technology
GMAT 1: 540 Q45 V20
GPA: 2.49
WE: Information Technology (Computer Software)
GMAT ToolKit User
If a group of 5 craftsmen takes 3 hours to finish a job  [#permalink]

Show Tags

New post 10 Mar 2017, 23:40
1
3
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

91% (01:09) correct 9% (02:16) wrong based on 65 sessions

HideShow timer Statistics

If a group of 5 craftsmen takes 3 hours to finish a job, how long will it take a group of 4 apprentices to do the same job?

(1) An apprentice works at 2/3 the rate of a craftsman.

(2) The 5 craftsmen and the 4 apprentices working together will take 45/23 hours to finish the job

_________________
Manager
Manager
avatar
P
Joined: 14 Oct 2015
Posts: 246
GPA: 3.57
Reviews Badge
Re: If a group of 5 craftsmen takes 3 hours to finish a job  [#permalink]

Show Tags

New post 11 Mar 2017, 01:13
1
HKD1710 wrote:
If a group of 5 craftsmen takes 3 hours to finish a job, how long will it take a group of 4 apprentices to do the same job?

(1) An apprentice works at 2/3 the rate of a craftsman.

(2) The 5 craftsmen and the 4 apprentices working together will take 45/23 hours to finish the job


I figured D.

1- An apprentice works at 2/3 the rate of a craftsman.

5 craftsmen finish work in 3 hours.
--> 1 craftsman does the job in \(= 5x3 = 15h\)
--> 1 apprentice = 2/3 craftsman
--> time by 1 apprentice will hence be reciprocal \(=15 x 3/2 = 45/2 = 22.5\)
--> time by 4 apprentices \(= 22.5/4 = 5.625\)

1 is -- clearly sufficient.

2- I kind of figured there is just one variable unknown which is the time taken by apprentices alone. We have rate of work of craftsmen and craftsmen + apprentices combined. One variable can be easily found. I actually found this question on a quick search, solved a few years ago.

https://gmatclub.com/forum/work-word-pr ... ml#p843620
_________________
Please hit Kudos if this post helped you inch closer to your GMAT goal.
Procrastination is the termite constantly trying to eat your GMAT tree from the inside.
There is one fix to every problem, working harder!
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 12034
Re: If a group of 5 craftsmen takes 3 hours to finish a job  [#permalink]

Show Tags

New post 22 Dec 2018, 16:28
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: If a group of 5 craftsmen takes 3 hours to finish a job   [#permalink] 22 Dec 2018, 16:28
Display posts from previous: Sort by

If a group of 5 craftsmen takes 3 hours to finish a job

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne