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.
It appears that you are browsing the GMAT Club forum unregistered!
Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club
Registration gives you:
Tests
Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.
Applicant Stats
View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more
Books/Downloads
Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
3 machines have a productivity ratio of 1 to 2 to 5. All 3 [#permalink]
16 Feb 2011, 03:34
2
This post received KUDOS
9
This post was BOOKMARKED
00:00
A
B
C
D
E
Difficulty:
(N/A)
Question Stats:
71% (03:55) correct
29% (02:50) wrong based on 33 sessions
3 machines have a productivity ratio of 1 to 2 to 5. All 3 machines are working on a job for 3 hours. At the beginning of the 4th hour, the slowest machine breaks. It is fixed at the beginning of hour seven, and begins working again. The job is done in nine hours. What was the ratio of the work performed by the fastest machine as compared to the slowest?
Re: Ratio & Proportion [#permalink]
16 Feb 2011, 06:50
4
This post received KUDOS
Expert's post
5
This post was BOOKMARKED
3 machines have a productivity ratio of 1:2:5. all 3 machines are working on a job for 3 hours. at the beginning of the 4th hour, the slowest machine breaks. it is fixed at the beginning at hour 7, and begins working again. the job is done in 9 hours. what was the ratio of the work performed by the fastest machine to the work performed by the slowest?
"3 machines have a productivity ratio of 1:2:5" means that in a time interval (1 hour, 1 year, ...) the first machine can produce 1 part (so it's the slowest one), the second can produce 2 parts and the third and fastest one can produce 5 parts.
Now, the fastest machine worked for whole 9 hours thus produced 9*5=45 parts but the slowest machine worked only for 6 hours thus produced 6*1=6 parts, so the ratio of the work performed by the fastest machine to the work performed by the slowest is 45/6=15/2. _________________
Re: Ratio & Proportion [#permalink]
11 Aug 2011, 05:02
1
This post received KUDOS
ruturaj wrote:
please explain how slowest machine works for 6 hours
slowest machine worked 1st hour 2nd hour 3rd hour Got broken got fixed and returned to work at the beginning of the 7th hour so: 7th hour 8th hour 9th hour
Total of 6 hours.
So the slowest machine made 6 pieces, while the fastest machine made 45 _________________
Re: Ratio & Proportion [#permalink]
11 Aug 2011, 07:02
ruturaj wrote:
please explain how slowest machine works for 6 hours
3 machines have a productivity ratio of 1:2:5. all 3 machines are working on a job for 3 hours. at the beginning of the 4th hour, the slowest machine breaks. it is fixed at the beginning at hour 7, and begins working again. the job is done in 9 hours. what was the ratio of the work performed by the fastest machine to the work performed by the slowest?
Productivity ratio of 1:2:5 means;
In 1 hour: Slowest machine just finishes 1 work Medium fast machine finishes 2 work Fastest machine finishes 5 work
3 hours work: Slowest: 3*1=3 work Medium: 3*2=6 work Fastest: 3*5=15 work
THEN SLOWEST BREAKS. It misses(3 hours): 4th hour 5th hour 6th hour
During which: Medium fast completes: 3*2=6 work Fastest completes: 3*5=15 work
Then 7th, 8th, 9th hour(3 hours) Slowest: 3*1=3 work Medium: 3*2=6 work Fastest: 3*5=15 work
Work by fastest:Work by slowest 15+15+15:3+3 45:6 15:2 _________________
Re: Ratio & Proportion [#permalink]
02 Dec 2012, 21:49
The productivity ratio of the fastest machine to the slowest machine is 5:1.
The fastest machine worked for 9 straight hours. Thus, W = 5 x 9 = 45 The slowest machine brokedown in the 4th hour and was revived on the 7th hour. Thus, W = 1 x 6 = 6
The Output Ratio of fastest to slowest is 45 is to 6 ==> 15 : 2 _________________
Re: 3 machines have a productivity ratio of 1 to 2 to 5. All 3 [#permalink]
27 Jun 2014, 06:37
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. _________________
Re: 3 machines have a productivity ratio of 1 to 2 to 5. All 3 [#permalink]
03 Oct 2015, 03:04
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. _________________
The “3 golden nuggets” of MBA admission process With ten years of experience helping prospective students with MBA admissions and career progression, I will be writing this blog through...
You know what’s worse than getting a ding at one of your dreams schools . Yes its getting that horrid wait-listed email . This limbo is frustrating as hell . Somewhere...
Wow! MBA life is hectic indeed. Time flies by. It is hard to keep track of the time. Last week was high intense training Yeah, Finance, Accounting, Marketing, Economics...