Aquarium Problem - less troublesome method to solve? - The Beat The GMAT Forum

Aquarium Problem - less troublesome method to solve?

Expert replies

zachthegnome: Junior | Next Rank: 30 Posts; Posts: 10; Joined: Sun Nov 07, 2010 8:02 am; Thanked: 1 times

by zachthegnome » Thu Jan 06, 2011 5:04 am

There must be a way to do this one without all of the math. Please let me know if any of you guys see it.

A small cubical aquarium has a depth of 1 foot. In the small aquarium there is a big fish with volume 44 cubic inches. A big cubical aquarium has a depth of 2 feet and 88 fishes each with a volume of 2 cubic inches. What is the difference in the amount of water between teh two aquariums if they are both completly filled?

A) 246
B) 300
C) 11,964
D) 13,824
E) 16,348

answer is C

Thank you in advance.

Like this post

Source: Beat The GMAT — Problem Solving | Thu Jan 06, 2011 5:04 am

shovan85: Community Manager; Posts: 991; Joined: Thu Sep 23, 2010 6:19 amFollowed by: 24 members; Location: Bangalore, India; Thanked: 146 times

by shovan85 » Thu Jan 06, 2011 5:26 am

zachthegnome wrote:There must be a way to do this one without all of the math. Please let me know if any of you guys see it.

A small cubical aquarium has a depth of 1 foot. In the small aquarium there is a big fish with volume 44 cubic inches. A big cubical aquarium has a depth of 2 feet and 88 fishes each with a volume of 2 cubic inches. What is the difference in the amount of water between teh two aquariums if they are both completly filled?

A) 246
B) 300
C) 11,964
D) 13,824
E) 16,348

answer is C

Thank you in advance.

1 ft = 12 inch

Volume of water in first cubicle 12 * 12 * 12 - 44
Volume of water in second cubicle 24 * 24 * 24 - (2*88)

Difference = [24 * 24 * 24 - (2*88)] - [12 * 12 * 12 - 44]
= (24 * 24 * 24 - 12 * 12 * 12) - (2*88 - 44)
= 12 * 12 * 12 (8-1) - 44(4-1)
= 12096 - 132
=11964

If the problem is Easy Respect it, if the problem is tough Attack it

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

563 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (563 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review