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

It is currently 25 Oct 2014, 08:55

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

The concentration of a certain chemical in a full water tank

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 23 Aug 2003
Posts: 462
Location: In the middle of nowhere
Followers: 1

Kudos [?]: 11 [0], given: 0

The concentration of a certain chemical in a full water tank [#permalink] New post 25 Mar 2004, 11:05
The concentration of a certain chemical in a full water tank depends on the depth of the water. At a depth that is x feet below the top of the tank, the concentration is 3+(4/sq root(5-x) )parts per million, where 0 < x < 4. To the nearest 0.1 foot, at what depth is the concentration equal to 6 parts per million?

(A) 2.4 ft
(B) 2.5 ft
(C) 2.8 ft
(D) 3.0 ft
(E) 3.2 ft

Vivek.
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

GMAT Club Legend
GMAT Club Legend
avatar
Joined: 15 Dec 2003
Posts: 4318
Followers: 23

Kudos [?]: 174 [0], given: 0

 [#permalink] New post 25 Mar 2004, 11:14
E for me
I think you just have to set (4/sq root(5-x) ) = 3
Isolate x and you get x=3.22
_________________

Best Regards,

Paul

Manager
Manager
avatar
Joined: 10 Mar 2004
Posts: 66
Location: Dallas,TX
Followers: 1

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

Re: Chemical [#permalink] New post 25 Mar 2004, 11:14
vivek_dj wrote:
The concentration of a certain chemical in a full water tank depends on the depth of the water. At a depth that is x feet below the top of the tank, the concentration is 3+(4/sq root(5-x) )parts per million, where 0 < x < 4. To the nearest 0.1 foot, at what depth is the concentration equal to 6 parts per million?

(A) 2.4 ft
(B) 2.5 ft
(C) 2.8 ft
(D) 3.0 ft
(E) 3.2 ft

Vivek.


3.2 feet

Equated the given equation to 6.
Senior Manager
Senior Manager
avatar
Joined: 05 Feb 2004
Posts: 291
Location: USA
Followers: 1

Kudos [?]: 2 [0], given: 0

 [#permalink] New post 25 Mar 2004, 13:08
I kind of did a calculated guess......please lemme know if you all think it's right or wrong:
Since the deepest point would be 4 ft, plugging in x = 4 would give us 7ppm as the concentration. So we narrow anser to D & E.........if we plugin 3 ft then we get 5.25 ppm, hence E should be the answer....wotsay folks??? :idea:
GMAT Club Legend
GMAT Club Legend
avatar
Joined: 15 Dec 2003
Posts: 4318
Followers: 23

Kudos [?]: 174 [0], given: 0

 [#permalink] New post 25 Mar 2004, 13:45
cbrf3 wrote:
I kind of did a calculated guess......please lemme know if you all think it's right or wrong:
Since the deepest point would be 4 ft, plugging in x = 4 would give us 7ppm as the concentration. So we narrow anser to D & E.........if we plugin 3 ft then we get 5.25 ppm, hence E should be the answer....wotsay folks??? :idea:

Nice :) Absolutely good
_________________

Best Regards,

Paul

  [#permalink] 25 Mar 2004, 13:45
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic The concentration of a certain chemical in a full water tank ankur55 4 23 Jun 2009, 04:01
The concentration of a certain chemical in a full water tank Ginc 2 20 Aug 2008, 01:15
The concentration of a certain chemical in a full water tank rfrcuhetr1 4 18 Sep 2006, 12:44
The concentration of a certain chemical in a full water tank amolp76 2 21 Mar 2006, 21:40
2 Experts publish their posts in the topic The concentration of a certain chemical in a full water tank joemama142000 9 16 Nov 2005, 17:58
Display posts from previous: Sort by

The concentration of a certain chemical in a full water tank

  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®.