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What is the volume of a rectangular solid? 1) Two adjacent

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What is the volume of a rectangular solid? 1) Two adjacent [#permalink] New post 05 Jul 2010, 08:25
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50% (02:57) correct 50% (00:00) wrong based on 2 sessions
What is the volume of a rectangular solid?
1) Two adjacent faces of the solid have areas of 15 and 24 repectively.
2) Each of two opposite faces of solid has area 40.
[Reveal] Spoiler: OA

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Re: DS 122 (12th edition GMAT review) [#permalink] New post 05 Jul 2010, 08:28
Im nt clear about the statement 2. I thought each of the two opposite faces means:
l*b= 40
b*h=40
l*h=40
it gives the value of l, b and h- which is Square root of 40.
what does the statement 2 mean?
OA is c.
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Re: DS 122 (12th edition GMAT review) [#permalink] New post 05 Jul 2010, 18:13
It means that out of the 6 faces of the solid rectangle, 2 opposite ones have an area of 40. This doesn't say anything about the 3rd dimension, so stmt2 is clearly insufficient to answer the question...
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Re: DS 122 (12th edition GMAT review) [#permalink] New post 08 Aug 2010, 20:07
bhandariavi wrote:
What is the volume of a rectangular solid?
1) Two adjacent faces of the solid have areas of 15 and 24 repectively.
2) Each of two opposite faces of solid has area 40.


I do not get this question. (2) says each of the two opposite faces. A rectangular solid has 6 faces and 3 pairs of 2 opposite faces. I read this as saying that basically all areas of the faces is 40. And thus the volume would be sqrt(40^3). Why is this wrong? On the other hand (1) is insufficient as it does not tell us about the entire solid. Bunuel?
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Re: DS 122 (12th edition GMAT review)   [#permalink] 08 Aug 2010, 20:07
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