Six machines, each working at the same constant rate, : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 17 Jan 2017, 02:14

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Six machines, each working at the same constant rate,

Author Message
Manager
Joined: 05 May 2005
Posts: 80
Followers: 1

Kudos [?]: 40 [0], given: 0

Six machines, each working at the same constant rate, [#permalink]

### Show Tags

09 Feb 2007, 20:43
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?
SVP
Joined: 08 Nov 2006
Posts: 1559
Location: Ann Arbor
Schools: Ross '10
Followers: 14

Kudos [?]: 189 [0], given: 1

### Show Tags

10 Feb 2007, 00:05
6 machines working together finish the task in 12 days.

6/x=1/12

x=72 days. 1 machine can complete the job in 72 days.

n*1/x=1/8

Substitute x=72 Solve and you get n=9

So 9 machines can complete the task in 8 days.
10 Feb 2007, 00:05
Display posts from previous: Sort by