Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1609:00 PM PDT
-10:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
May 1706:30 AM PDT
-08:30 AM PDT
We know Strengthen and Weaken questions account for more than 50% of the CR questions on the GMAT. With CR becoming even more important on GMAT Focus, it's time you strengthen your weaknesses with an approach that improves your solving time and accuracy!
May 1711:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.
May 1806:30 AM PDT
-08:30 AM PDT
Join Piyush Beriwala in this webinar as he guides you through a smart study plan to achieve the 99th %ile on the GMAT Focus. Learn the best strategies and tips to master the test and boost your score.
Jun 1006:00 AM PDT
-05:30 PM PDT
Register for the GMAT Club Virtual MBA Spotlight fair, the biggest MBA fair of the year. You will have a chance to hear Admissions directors from almost every Top 20 program speak, network with peers, and conveniently attend morning or afternoon sessions.
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (00:38) correct
11%
(00:54)
wrong
based on 477
sessions
History
Date
Time
Result
Not Attempted Yet
What is the volume of a certain cube?
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
11 Aug 2014, 21:39
Kudos
Bookmarks
joaomario
What is the volume of a certain cube?
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
All you need to uniquely define a cube is any one measurement - length of a side/edge, area of a surface, volume etc. If you have any one of them, you can uniquely determine the others. So each statement alone is sufficient here.
To show how,
(1) The sum of the lengths of the edges of the cube is 36.
A cube has 12 equal edges. Sum = 36. Length of each edge = 36/12 = 3
Volume = 3*3*3 = 27
(2) The surface area of the cube is 54.
A cube has 6 identical faces. Area of each face = s^2 (s is the length of the side)
6s^2 = 54
s = 3
Volume = 3*3*3 = 27
Answer (D)
11 Aug 2014, 06:57
Kudos
Bookmarks
joaomario
What is the volume of a certain cube?
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
(1) The sum of the lengths of the edges of the cube is 36.
(2) The surface area of the cube is 54.
For this question, you need to know:
1) A cube has 12 equal length sides, so sum of side length = 12 (length of one side)
2) surface area of a square = length x width (since length = width in a square) = length x length
3) A cube has 6 square faces with equal area, so sum of surface area = 6 (surface area of one side) = 6 (length x length)
4) volume of a cube = length x length x length
So, let's start with statement 1:
Sum of lengths = 36 = 12 (length of one side)
Using algebra, you know that length of one side = 3
Once you have length of one side, you know the volume of the cube. Therefore this is SUFFICIENT.
Eliminate B, C and E.
On to statement 2:
Total surface area = 54
Since there are 6 square faces: 54/6 = area for 1 face = 9
Since area of 1 face of square = 9 = length x length = 3x3
Length of one side = 3
Once you have length of one side, you know the volume of the cube. Therefore this is SUFFICIENT.
Correct answer D.
