Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 2107:00 PM EDT
-10:00 PM EDT
Boost your GMAT score in less than one month in a live online class + 6 months access to TTP OnDemand video courses included! Class starts Mon, Tues, Wed, Thur, Fri Sept. 21, 2026 - Oct. 9, 2027, 7:00pm-10:00pm EST
25 Jan 2009, 12:10
Kudos
Bookmarks
6 machines take 12 days to complete a job. How many more machines will be needed to complete the job in 8 days?
2
3
4
5
6
2
3
4
5
6
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Updated on: 25 Jan 2009, 15:56
Originally posted by IanStewart on 25 Jan 2009, 12:19.
Last edited by IanStewart on 25 Jan 2009, 15:56, edited 1 time in total.
Last edited by IanStewart on 25 Jan 2009, 15:56, edited 1 time in total.
wrote 'hours' instead of 'days'!
Kudos
Bookmarks
The job requires 6*12 = 72 total days of machine work. So, one machine would do the job in 72 days, two machines in 36 days, three machines would need 24 days, etc. To do the job in 8 days, we'd need 9 machines in total, or 3 additional machines.
25 Jan 2009, 13:22
Kudos
Bookmarks
If 6 machines take 12 days to complete the task, one machine takes 72 days. Let X be number of machines and d the number of days:
\(\frac{x}{72}=\frac{1}{d}\)
What you want is for d to equal 8, so X must be nine and you'll need 3 more machines.
Answer B
----------
All Day
\(\frac{x}{72}=\frac{1}{d}\)
What you want is for d to equal 8, so X must be nine and you'll need 3 more machines.
Answer B
----------
All Day
