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Shruti0805
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Bunuel
The largest possible cylinder is enclosed in a cube. What is the largest possible volume of the cylinder?

(1) The volume of the cube is 64 cubic units.
(2) The radius of the cylinder is 2 units.

IMO A

Statement 1: The volume of the cube is 64 cubic units:
This will restrict the height of the cylinder and radius of its base, so maximum possible volume can be determined.
SUFFICIENT

Statement 2: The radius of the cylinder is 2 units
This does not restrict the height of the cylinder, so the volume could be anything.
INSUFFICIENT


Hi,

The question mentions that the cylinder that's been enclosed is the largest possible. I guess that would mean that the cylinder has diameter of the same length as one of its sides. From statement 2, we know that the radius is 2 and thus, diameter is 4. Again, largest possible would imply that the height would be equal to the side of the cube which makes this statement sufficient in my opinion. What do you think?

Hi Shruti,

Yes, I think you are right. I missed the point you mentioned.
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Experts can you please provide a solution to this question?

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The largest possible cylinder is enclosed in a cube. What is the largest possible volume of the cylinder?

(1) The volume of the cube is 64 cubic units.
Largest possible cylinder will be that will be fit JUST exactly into the cube...
So cubes dimensions are 4*4*4, height of cylinder=2 and diameter also is 4..
Thus volume = \(\pi*2^2*4=16\pi\)
Sufficient

(2) The radius of the cylinder is 2 units.
We are given that the cylinder is fitted in cube, so if radius is 2 the diameter will be 4 ..
And the diameter will also be equal to the side of cube...
Since all dimensions of a cube are same, the diameter of cylinder will be SAME as the height..
Thus volume = \(\pi*2^2*4=16\pi\)
Sufficient

D
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Why are we not considering cylinder formed along the diagonal of the cube?? Will it not be largest possible??


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