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E
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Question Stats:
82% (00:58) correct
18%
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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 is 3
(1) The surface area of one of the faces of R is 48
(2) The length of one of the edges is 3
28 Apr 2010, 12:29
Kudos
Bookmarks
Its E.
from statement 1:
surface area of one face = l*b = 48,
then we can have the following combination of l*b.
1*48
2*24
3*16
4*12
6*8... and may be few more.. we can have different values of surface area depending on the value of third side.
from statement 2:
Alone one side is not enough.
From from statement 1 and from statement 2:
we can still have two cases : where l or b or itself is 3, then we still don't have the third side.
from statement 1:
surface area of one face = l*b = 48,
then we can have the following combination of l*b.
1*48
2*24
3*16
4*12
6*8... and may be few more.. we can have different values of surface area depending on the value of third side.
from statement 2:
Alone one side is not enough.
From from statement 1 and from statement 2:
we can still have two cases : where l or b or itself is 3, then we still don't have the third side.
28 Apr 2010, 12:56
Kudos
Bookmarks
What is the total surface area of rectange 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
My Ans - Both together also not sufficient.
Let us take opt 1)
there are two shapes in a rectangular solid
a. Squre shape - 2 nos
b. rectangular shape - 4 nos
we cant say for which shape the above given area belongs to..
So it is not sufficiant
Let us take opt 2)
Since length and breadth are different for rectangular solid. we cant deduce the area.
So it is not sufficient independently
let us take both together.
The above given area may be for Square or rectangular.
If it is square , it's side may be 4sqrt(3) and length may be 3. we can deduce area - 179.136
if it is rectangular , l=3,b=16.So area = 210.
So both together also not sufficient
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
My Ans - Both together also not sufficient.
Let us take opt 1)
there are two shapes in a rectangular solid
a. Squre shape - 2 nos
b. rectangular shape - 4 nos
we cant say for which shape the above given area belongs to..
So it is not sufficiant
Let us take opt 2)
Since length and breadth are different for rectangular solid. we cant deduce the area.
So it is not sufficient independently
let us take both together.
The above given area may be for Square or rectangular.
If it is square , it's side may be 4sqrt(3) and length may be 3. we can deduce area - 179.136
if it is rectangular , l=3,b=16.So area = 210.
So both together also not sufficient
