It is currently 22 Sep 2017, 03:13

### 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

# Events & Promotions

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

# Pump one can fill tank to 1/3 capacity in 45 minutes Pump 2

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Senior Manager
Joined: 02 May 2004
Posts: 311

Kudos [?]: 7 [0], given: 0

Pump one can fill tank to 1/3 capacity in 45 minutes Pump 2 [#permalink]

### Show Tags

26 Aug 2007, 06:24
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Pump one can fill tank to 1/3 capacity in 45 minutes
Pump 2 can fill it to 2/3 capacity in 2 hours
Pump 3, a pump that pumps the tank out and unfill it in 1.5 hours
How long would it take to fill the tank if all 3 were working at same time?

A. 4.5
B. 6
C. 8
D. 9
E. 12

Kudos [?]: 7 [0], given: 0

VP
Joined: 08 Jun 2005
Posts: 1144

Kudos [?]: 239 [0], given: 0

### Show Tags

26 Aug 2007, 09:00
First pump = full tank = 2.25 hours

Second pump = full tank = 3 hours

Third pump = empty full tank = 1.5 hours

1/2.25+1/3-1/1.5 =

4/9+3/9-6/9 = 1/9 = working together per one hour

so the job will take nine hours to be completed

the answer is (D)

Kudos [?]: 239 [0], given: 0

26 Aug 2007, 09:00
Display posts from previous: Sort by

# Pump one can fill tank to 1/3 capacity in 45 minutes Pump 2

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.