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

It is currently 27 Jul 2014, 22:20

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

When both floodgates A and B are open, a reservoir drains in

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
avatar
Joined: 06 Jun 2004
Posts: 1062
Location: CA
Followers: 2

Kudos [?]: 20 [0], given: 0

GMAT Tests User
When both floodgates A and B are open, a reservoir drains in [#permalink] New post 17 Oct 2005, 20:47
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
When both floodgates A and B are open, a reservoir drains in 3(1/3) days. If floodgate A alone drains the reservoir in 10 days, how many days does it take floodgate B alone to drain the reservoir?

A. 4
B. 5
C. 6 2/3
D. 10
E. 12

My way of solving follows, let me know if my concept is right.







3 1/3 days = 10/3 days

1/10 + B = 1/ (10/3) => 1/10 + B = 3/10

B = 3/10 - 1/10 = 2/10 = 1/5

Answer is B, 5 days
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 16

Kudos [?]: 131 [0], given: 0

GMAT Tests User
 [#permalink] New post 17 Oct 2005, 21:12
A: 10 days -> 1 job; 1 day -> 1/10 job
B: x days -> 1 job; 1 day -> 1/x job

Together: (1/10 + 1/x) job in 1 day = (x + 10)/10x

Together: 10/3 days -> 1 job; 1 day -> 3/10 job = (x+10)/10x

30x = 10x + 100
20x = 100
x = 5 (B)
VP
VP
avatar
Joined: 06 Jun 2004
Posts: 1062
Location: CA
Followers: 2

Kudos [?]: 20 [0], given: 0

GMAT Tests User
 [#permalink] New post 17 Oct 2005, 21:26
ywilfred wrote:
A: 10 days -> 1 job; 1 day -> 1/10 job
B: x days -> 1 job; 1 day -> 1/x job

Together: (1/10 + 1/x) job in 1 day = (x + 10)/10x

Together: 10/3 days -> 1 job; 1 day -> 3/10 job = (x+10)/10x

30x = 10x + 100
20x = 100
x = 5 (B)


Thanks, that's what I thought :-D
  [#permalink] 17 Oct 2005, 21:26
    Similar topics Author Replies Last post
Similar
Topics:
9 Experts publish their posts in the topic With both inlets open, a water tank will be filled with wate aselfmademan 4 31 Oct 2011, 01:07
2 Experts publish their posts in the topic With both valves open, the pool will be filled with water in arjtryarjtry 6 02 Sep 2008, 01:23
With both valves open, the pool will be filled with water in bmwhype2 1 21 Nov 2007, 05:09
The floodgates really opened today pelihu 19 01 Oct 2007, 13:56
When a new restaurant, Martin s Cafe, opened in Riverville vivek123 11 19 Jan 2006, 09:14
Display posts from previous: Sort by

When both floodgates A and B are open, a reservoir drains in

  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®.