Find all School-related info fast with the new School-Specific MBA Forum

It is currently 28 Aug 2015, 01:33
GMAT Club Tests

Close

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
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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

It takes the same time for a ship to travel 80 miles

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
User avatar
Joined: 19 Aug 2006
Posts: 222
Followers: 1

Kudos [?]: 19 [0], given: 0

It takes the same time for a ship to travel 80 miles [#permalink] New post 03 Nov 2006, 00:58
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

It takes the same time for a ship to travel 80 miles upstream trip and to travel 120 miles downstream. If the ship maintains a rate of 20 mile/h in still water, what is the speed of river water?
Manager
Manager
avatar
Joined: 01 Nov 2006
Posts: 70
Followers: 1

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

Re: Speed of river water (PS) [#permalink] New post 03 Nov 2006, 17:09
johnycute wrote:
It takes the same time for a ship to travel 80 miles upstream trip and to travel 120 miles downstream. If the ship maintains a rate of 20 mile/h in still water, what is the speed of river water?


Let T = time is takes to travel
R = speed of the river

80 = T (20 - R)
120 = T (20 + R)

and solve 80/(20- R) = 120/(20 +R)
80*(20 + R) = 120*(20 -R)

1600 + 80R = 2400 - 120R
200R = 800
R = 4 mph

(and, unfortunately, this is a junior high school problem)
Re: Speed of river water (PS)   [#permalink] 03 Nov 2006, 17:09
Display posts from previous: Sort by

It takes the same time for a ship to travel 80 miles

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.