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surface area - gmatprep

by arocks » Sat Oct 13, 2007 1:29 am
What is the total surface area of rectangular solid R?

1) the surface area of one of the faces of R is 48
2) the length of one of the edges of R is 3

OA - E
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by camitava » Sat Oct 13, 2007 1:38 am
The catch is in the word - rectangular solid R. It is not saying cube or so. Though R is rectangular solid, it can happen that length of one side is less than that of the other. So 1 is not giving the full information so as with 2. So E is the best option to chose.
Correct me If I am wrong


Regards,

Amitava
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