It is currently 24 Jun 2017, 04:06

### 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

# Running at their respective constant rates, machine X takes

Author Message
Intern
Joined: 18 Jun 2004
Posts: 21
Running at their respective constant rates, machine X takes [#permalink]

### Show Tags

17 Sep 2004, 12:43
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Running at their respective constant rates, machine X takes 2 days longer to produce w widgets than machine Y. At these rates, if the two machines together produce (5/4)*w widgets in 3 days, how many days would it take machine X alone to produce 2w widgets?

A. 4
B. 6
C. 8
D. 10
E. 12
Manager
Joined: 07 Sep 2004
Posts: 60

### Show Tags

18 Sep 2004, 04:48
X working alone perform job in t days
The other perform job in t-2 days

since 5/4job in 3 days implies job if worked together is 3*4/5 = 12/5 days

1/t + 1/t-2 = 1/(12/5)

solving for t we get t = 6

double the job requires 6*2=12 days
Intern
Joined: 18 Jun 2004
Posts: 21

### Show Tags

18 Sep 2004, 05:10
great , thanks.
Israeli - Lebanon working together - nice thing we are getting here
18 Sep 2004, 05:10
Display posts from previous: Sort by