It is currently 21 Oct 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

# A certain tank is exactly one quarter full of water. At noon

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 25 Feb 2008
Posts: 53

Kudos [?]: 14 [0], given: 0

A certain tank is exactly one quarter full of water. At noon [#permalink]

### Show Tags

21 Mar 2008, 06:13
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A certain tank is exactly one quarter full of water. At noon a valve is opened allowing water to pour into the tank at the rate of 90 gallons an hour. Half an hour later, the tank is exactly one third full. How many gallons of water does the tank hold when it is completely full?
375
410
450
510
540
Optional: time you spend on this question

Kudos [?]: 14 [0], given: 0

Manager
Joined: 20 Aug 2007
Posts: 64

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

Re: tank of water [#permalink]

### Show Tags

21 Mar 2008, 06:57
Capthan wrote:
A certain tank is exactly one quarter full of water. At noon a valve is opened allowing water to pour into the tank at the rate of 90 gallons an hour. Half an hour later, the tank is exactly one third full. How many gallons of water does the tank hold when it is completely full?
375
410
450
510
540
Optional: time you spend on this question

Let full capacity = X
(X/4) + 45 = (X/3)
3X + 540 = 4X
X = 540

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

Manager
Joined: 28 Sep 2007
Posts: 209

Kudos [?]: 17 [0], given: 0

Re: tank of water [#permalink]

### Show Tags

21 Mar 2008, 08:06
It would be 540.

1/3-1/4=1/12=amount filled up within 30 min.

90 gallons an hour/2 = 45 gallons in 30 min

45x12=540

Kudos [?]: 17 [0], given: 0

Manager
Joined: 31 Oct 2007
Posts: 112

Kudos [?]: 73 [0], given: 0

Location: Frankfurt, Germany
Re: tank of water [#permalink]

### Show Tags

21 Mar 2008, 08:07
Alternatively, the increase is 1/3 - 1/4 = 1/12
and 1/12th = 45gallons

Therefore 12/12th (or 1) = 45 * 12 = 540

Ans: E
_________________

Jimmy Low, Frankfurt, Germany
Blog: http://mytrainmaster.wordpress.com
GMAT Malaysia: http://gmatmalaysia.blogspot.com

Kudos [?]: 73 [0], given: 0

Re: tank of water   [#permalink] 21 Mar 2008, 08:07
Display posts from previous: Sort by

# A certain tank is exactly one quarter full of water. At noon

 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®.