It is currently 23 Jun 2017, 12:23

### 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

# a tough PS problem

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 02 Mar 2007
Posts: 30
a tough PS problem [#permalink]

### Show Tags

10 Mar 2007, 07:21
00:00

Difficulty:

(N/A)

Question Stats:

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

### HideShow timer Statistics

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

hi,

i've just finished working on this one. in my view it's challenging...
Attachments

PS.JPG [ 33.87 KiB | Viewed 727 times ]

VP
Joined: 28 Mar 2006
Posts: 1369

### Show Tags

10 Mar 2007, 07:31
I think it is A

1 ft = 1/5280 mile

so 20 ft = 20/5280 miles

.5 sec = .5/(60)^2 hour

So speed = dist/time = (20/5280)*(3600/.5)
Intern
Joined: 02 Mar 2007
Posts: 30

### Show Tags

10 Mar 2007, 07:54
it's A) indeed. While solving it i made a small technical mistake and it took me around 5 minutes to find the flaw. So my advice: be very careful when you have to translate minutes in hours, miles in meters and so on...
Director
Joined: 18 Jul 2006
Posts: 524

### Show Tags

10 Mar 2007, 19:10
20/.5 feet/sec => (20/.5)*(60*60/5250) miles/hr
10 Mar 2007, 19:10
Display posts from previous: Sort by

# a tough PS problem

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO 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®.