rectangler solid

This topic has expert replies
Senior | Next Rank: 100 Posts
Posts: 44
Joined: Sat Mar 28, 2009 11:28 am

rectangler solid

by baller12q » Sun Mar 29, 2009 6:23 pm
What is the total surface area of rectangler solid R?

1) The surface area of one of the faces of R is 48

2) The lenght of one of theedges of R is 3

Junior | Next Rank: 30 Posts
Posts: 21
Joined: Mon Nov 24, 2008 1:56 am

by Ramp » Sun Mar 29, 2009 6:31 pm
E
A and B are insufficient.
Even when taken together we can not find surface area of whole rect. solid.

Master | Next Rank: 500 Posts
Posts: 260
Joined: Sun Oct 12, 2008 8:10 pm
Thanked: 4 times

by PAB2706 » Sun Mar 29, 2009 8:30 pm
IMO A

Junior | Next Rank: 30 Posts
Posts: 26
Joined: Tue Oct 21, 2008 12:10 pm
Thanked: 3 times
GMAT Score:770

by cm47323 » Sun Mar 29, 2009 11:28 pm
E

If I'm not mistaken, you need to know the values of the three edges.

1. Insufficient. Gives the product of two edges
2. Insufficient. Gives one edge

Combined is still insufficient. Still only know 1, or at most 2 sides (in the case the side mentioned in (1) is 16x3.

Senior | Next Rank: 100 Posts
Posts: 33
Joined: Thu Feb 19, 2009 7:19 pm
Location: DC
Thanked: 2 times

by iwant700plus » Mon Mar 30, 2009 7:26 am
I also get E.

Master | Next Rank: 500 Posts
Posts: 322
Joined: Fri Mar 27, 2009 3:56 pm
Thanked: 24 times
GMAT Score:710

by mike22629 » Mon Mar 30, 2009 12:04 pm
A Insufficient
You know the one of the surfaces is 48. This alone is not sufficient however it lets you know possible dimensions.

12X4
24X2
16X3

B Insufficient
It tells you one of the sides is 3. Now if 48 was not divisible by 3, this would be sufficient. Since it is divisible by 3, you do not know whether this information is referring to the last dimension or repeating the previous dimension.

IMO E

Master | Next Rank: 500 Posts
Posts: 322
Joined: Fri Mar 27, 2009 3:56 pm
Thanked: 24 times
GMAT Score:710

by mike22629 » Mon Mar 30, 2009 12:05 pm
A Insufficient
You know the one of the surfaces is 48. This alone is not sufficient however it lets you know possible dimensions.

12X4
24X2
16X3

B Insufficient
It tells you one of the sides is 3. Now if 48 was not divisible by 3, this would be sufficient. Since it is divisible by 3, you do not know whether this information is referring to the last dimension or repeating the previous dimension.

IMO E

Master | Next Rank: 500 Posts
Posts: 322
Joined: Fri Mar 27, 2009 3:56 pm
Thanked: 24 times
GMAT Score:710

by mike22629 » Mon Mar 30, 2009 12:05 pm
A Insufficient
You know the one of the surfaces is 48. This alone is not sufficient however it lets you know possible dimensions.

12X4
24X2
16X3

B Insufficient
It tells you one of the sides is 3. Now if 48 was not divisible by 3, this would be sufficient. Since it is divisible by 3, you do not know whether this information is referring to the last dimension or repeating the previous dimension.

IMO E