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

It is currently 20 Feb 2019, 00:16

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
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Free GMAT Prep Hour

     February 20, 2019

     February 20, 2019

     08:00 PM EST

     09:00 PM EST

    Strategies and techniques for approaching featured GMAT topics. Wednesday, February 20th at 8 PM EST
  • Online GMAT boot camp for FREE

     February 21, 2019

     February 21, 2019

     10:00 PM PST

     11:00 PM PST

    Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.

A contractor undertakes to do a job in 20 days so he employs 36 labore

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

Hide Tags

 
Manager
Manager
avatar
G
Joined: 29 Nov 2018
Posts: 102
Concentration: Marketing, Strategy
A contractor undertakes to do a job in 20 days so he employs 36 labore  [#permalink]

Show Tags

New post 06 Feb 2019, 08:04
1
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

67% (02:34) correct 33% (02:45) wrong based on 3 sessions

HideShow timer Statistics

A contractor undertakes to do a job in 20 days so he employs 36 laborers. After 5 days he realizes that three-eleventh of the work is over. To finish the work exactly on time, how many more laborers does he need to employ or how many can he afford to fire?

A. Hire 4
B. Hire 32
C. Fire 4
D. Hire 32
E. Fire 16
Manager
Manager
avatar
G
Joined: 02 Aug 2015
Posts: 150
Re: A contractor undertakes to do a job in 20 days so he employs 36 labore  [#permalink]

Show Tags

New post 06 Feb 2019, 09:39
cfc198 wrote:
A contractor undertakes to do a job in 20 days so he employs 36 laborers. After 5 days he realizes that three-eleventh of the work is over. To finish the work exactly on time, how many more laborers does he need to employ or how many can he afford to fire?

A. Hire 4
B. Hire 32
C. Fire 4
D. Hire 32
E. Fire 16


After 5 days he realizes that three-eleventh of the work is over = 5x36 = 180 worker days = 3/11th of work.
So remaining 8/11th of work = 480 worker days. We have 15 days remaining, so 15 days x 'n' workers = 480 worker days. So n=32.
Hence of the 36 workers, 4 of the workers can be fired. Hence C.

Cheers!
Intern
Intern
avatar
B
Joined: 14 May 2018
Posts: 41
GMAT 1: 710 Q49 V38
Re: A contractor undertakes to do a job in 20 days so he employs 36 labore  [#permalink]

Show Tags

New post 06 Feb 2019, 11:34
cfc198 wrote:
A contractor undertakes to do a job in 20 days so he employs 36 laborers. After 5 days he realizes that three-eleventh of the work is over. To finish the work exactly on time, how many more laborers does he need to employ or how many can he afford to fire?

A. Hire 4
B. Hire 32
C. Fire 4
D. Hire 32
E. Fire 16


One quick way to solve is-

25% days over, work done=27% approximately
==> needs to fire people, A,B,D re out

Now common sense says that out of C and E,C should be right because the gap between work needed to be done and number of days left is not too huge.

Therefore,C
_________________

Now that I am done with my College Applications, I will try and be more regular here and help out aspirants and give back to this wonderful community. Please hit kudos if you like my answers.

GMAT:710 (Q49,V38,IR8,AWA5)

VP
VP
avatar
P
Joined: 07 Dec 2014
Posts: 1156
Re: A contractor undertakes to do a job in 20 days so he employs 36 labore  [#permalink]

Show Tags

New post 06 Feb 2019, 12:01
cfc198 wrote:
A contractor undertakes to do a job in 20 days so he employs 36 laborers. After 5 days he realizes that three-eleventh of the work is over. To finish the work exactly on time, how many more laborers does he need to employ or how many can he afford to fire?

A. Hire 4
B. Hire 32
C. Fire 4
D. Hire 32
E. Fire 16


if 36 laborers can complete 3/11 of work in in 5 days,
then they can complete 12/11 of the work in 20 days,
for an excess of 1/11
let rate=(3/11)/(5*36)=1/660
let w=number of excess workers
15w/660=1/11
w=4
Fire 4
C
GMAT Club Bot
Re: A contractor undertakes to do a job in 20 days so he employs 36 labore   [#permalink] 06 Feb 2019, 12:01
Display posts from previous: Sort by

A contractor undertakes to do a job in 20 days so he employs 36 labore

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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

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®.