Last visit was: 19 Nov 2025, 12:13 It is currently 19 Nov 2025, 12:13
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
Yash12345
Joined: 21 Sep 2013
Last visit: 09 Dec 2015
Posts: 25
Own Kudos:
135
 [7]
Given Kudos: 82
Location: United States
Concentration: Finance, General Management
GMAT Date: 10-25-2013
GPA: 3
WE:Operations (Mutual Funds and Brokerage)
Posts: 25
Kudos: 135
 [7]
Kudos
Add Kudos
7
Bookmarks
Bookmark this Post
User avatar
DropBear
Joined: 04 May 2015
Last visit: 30 Jul 2016
Posts: 64
Own Kudos:
32
 [2]
Given Kudos: 58
Concentration: Strategy, Operations
WE:Operations (Military & Defense)
Posts: 64
Kudos: 32
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
GMATBusters
User avatar
GMAT Tutor
Joined: 27 Oct 2017
Last visit: 14 Nov 2025
Posts: 1,924
Own Kudos:
6,647
 [4]
Given Kudos: 241
WE:General Management (Education)
Expert
Expert reply
Posts: 1,924
Kudos: 6,647
 [4]
4
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
lerogmat
Joined: 20 Feb 2019
Last visit: 03 Jun 2019
Posts: 2
Own Kudos:
2
 [2]
Given Kudos: 1
Posts: 2
Kudos: 2
 [2]
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
A saltwater solution completely fills a glass cylinder. If the solution is then poured into a larger rectangular aquarium, what percent more solution would be needed to completely fill the aquarium?

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: sq rt 2

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

Can someone explain me this one?

Thanks in advance
User avatar
ocelot22
Joined: 16 Oct 2011
Last visit: 24 Sep 2025
Posts: 168
Own Kudos:
134
 [1]
Given Kudos: 545
GMAT 1: 640 Q38 V40
GMAT 2: 650 Q44 V36
GMAT 3: 570 Q31 V38
GMAT 4: 720 Q49 V40
GPA: 3.75
Products:
GMAT 4: 720 Q49 V40
Posts: 168
Kudos: 134
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
lerogmat
A saltwater solution completely fills a glass cylinder. If the solution is then poured into a larger rectangular aquarium, what percent more solution would be needed to completely fill the aquarium?

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: sq rt 2

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

Can someone explain me this one?

Thanks in advance

IF YOU FIND MY SOLUTION HELPFUL, PLEASE GIVE ME KUDOS

It is necessary to know the formulas for volume of a cylinder and volume of a rectangular solid. They are v = pi*r^2h and v=lwh Also, if we can get the algebraic expressions for volume of the cylinder and volume of the aquarium to contain the same variables, we could pick values for the variables to determine the relative volumes in term of a percentage.

(1) The ratio of the diagonal of the base of the aqarium to the diameter of the cylander is 1:sq rt 2 Ok so our cylinder will have diameter sq rt 2 * x and radius = (xrt2)/2. Lets call the diagonal of the base of the aquarium and the diameter of the cylinder x. Lets call the heights of the cylinder and aquarium h1 and h2. So the volume of our cylinder will be pi*(xrt2/2)^2 *h1. Now, since we have a rectangular aquarium, and we know the diagonal of the base is x, we know that the width of the base is x/2 and the length of the base is x*rt 3/2, since the diagonal of any rectangle forums a 30 - 60- 90 right triangle whose dimensions are in the ratio 1: 1rt3: 2. So, volume of the aquarium is then x*xroot3 * h2. Since the volume of the cylinder and the volume of the aquarium contain different variables, we cannot know their relative volumes. NS

(2) the height and width of the aquarium are equal to the height and diameter of the cylinder. Lets call the height H and the width and diameter of the aquarium x. Then the volume of the cylander is pi*(x/2)^2 * h, and the volume of the aquarium is h*x*L Since the volume of the aquarium contains the variable L for length, we cannot find the volume of the aquarium relative to the cylinder. NS

(1) and (2) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: root2 And the height and width of the aquarium are equal to the height and diameter of the cylinder. Ok, so the radius of the cylinder is xroot2/2, the height of the cylinder we can call H3, and the length, width and height of the aquarium are x/2, (xroot3)/2 and H3 (since the heights of the two shapes are the same).

So, our volumes of the cylinder and aquarium are pi*(xrt2/2)^2*H3 and (x/2)*(xroot3)/2*H3. Since there are now, no variables in the expressions for volume of the cylinder that are not in the expression for the volume of the aquarium ( and vice versa) we could pick values for both x and H3. Since we are only needing the volume of the aquarium in relative terms as a percentage of the cylinder, we are Sufficient.

The answer is C
User avatar
GMATRockstar
Joined: 21 Apr 2014
Last visit: 12 Nov 2025
Posts: 90
Own Kudos:
Given Kudos: 3
Expert
Expert reply
Posts: 90
Kudos: 793
Kudos
Add Kudos
Bookmarks
Bookmark this Post
A saltwater solution completely fills a glass cylinder. If the solution is then poured into a larger rectangular aquarium, what percent more solution would be needed to completely fill the aquarium?

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: sq rt 2

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

This is a "Value" DS question, so sufficiency will be achieved if a statement allows for one value and one value only.

This question is about volume. We have a certain volume in a cylinder. Volume of a cylinder = pi*r^2*h (area of the circle/base x the height of the tube). Then we pour that volume into a rectangular prism.

To know what percent more solution would be needed to fill the aquarium, we need to know HOW FULL it currently is. So we need two pieces of info:

-the amount of the original volume (pi*r^2*h)
-the total volume of the prism (Volume = lwh)

To know how full it currently is, is essentially that ratio of (pi*r^2*h)/lwh.
If we ignore pi, we essentially need to understand the ratio between the radius and the length and width, and the ratio of the heights.

Let's look at the statements:

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: sq rt 2

This gives us a relationship between the width and length to the diameter, but not quite enough info. It basically says that:
diameter = 2(w^2 + l^2), once we simplify it down. This is great, since we know radius is half the diameter, but we don't know anything about the heights.

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

This gives us the info we need about the heights! They are equal! And also, the diameter is equal to the width of the aquarium. We have the relationships we need to solve.

I would not recommend you actually attempt to solve a question like this. It is definitely going to take way more than 2 minutes, and I think it's a 700+ level "time-waster." If you can't "logic" your way through it, I think making your best guess and moving on is the way to go.
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi Bunuel,
This question has been discussed in the another thread. Here is the LINK of that thread.
Also, there is no SPOILER in this newly made thread!
Thanks__

lerogmat
A saltwater solution completely fills a glass cylinder. If the solution is then poured into a larger rectangular aquarium, what percent more solution would be needed to completely fill the aquarium?

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is 1: sq rt 2

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

Can someone explain me this one?

Thanks in advance
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,589
Own Kudos:
Posts: 38,589
Kudos: 1,079
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.

This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Data Sufficiency (DS) Forum for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
Moderators:
Math Expert
105390 posts
496 posts