BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

solid geometry

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 am
Thanked: 230 times
Followed by:21 members

by shankar.ashwin » Sat Dec 24, 2011 10:54 pm
I believe the length of the bigger cube would be the LCM of the 3 numbers/dimensions 24

Now volume of both the figures should be the same.

So, x * (4*6)*8 = 24^3

x = 72. None of the above choices IMO.
Last edited by shankar.ashwin on Sun Dec 25, 2011 6:04 am, edited 1 time in total.
Top
Legendary Member
Posts: 1084
Joined: Fri Apr 15, 2011 2:33 pm
Thanked: 158 times
Followed by:21 members

by pemdas » Sun Dec 25, 2011 12:35 am
del.
quantskillsgmat wrote:If cuboids of dimension 4x6x8 are joined to form a cube.how many cuboids are needed to make smallest possible cube having integer side.
a)20
b)24
c)13
d)16
e)none
Last edited by pemdas on Sun Dec 25, 2011 7:46 am, edited 1 time in total.
Success doesn't come overnight!
Top
Master | Next Rank: 500 Posts
Posts: 385
Joined: Fri Sep 23, 2011 9:02 pm
Thanked: 62 times
Followed by:6 members

by user123321 » Sun Dec 25, 2011 6:40 am
I agree with Ashwin on this. As final length of cube should be LCM of those 3 numbers.
so we have 24*24*24 cube and for that we need...
(24*24*24)/4*6*8 = 6*4*3 = 72 cuboids

user123321
Just started my preparation :D
Want to do it right the first time.
Top
Legendary Member
Posts: 1084
Joined: Fri Apr 15, 2011 2:33 pm
Thanked: 158 times
Followed by:21 members

by pemdas » Sun Dec 25, 2011 7:45 am
i think you are guys right, as I haven't accounted for the internal face

so the answer is e?
Success doesn't come overnight!
Top
Post new topic Post Reply
• Page 1 of 1