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# A cubical tank is filled with water to a level of 2 feet. If

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Manager
Joined: 27 Feb 2004
Posts: 185
Location: illinois
A cubical tank is filled with water to a level of 2 feet. If [#permalink]

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27 Mar 2004, 01:15
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A cubical tank is filled with water to a level of 2 feet. If the water in the tank occupies 18 cubic feet, to what fraction of its capacity is the tank filled with water

A)1/9
B)2/9
C)1/3
D)1/2
E)2/3
Senior Manager
Joined: 02 Mar 2004
Posts: 327
Location: There

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27 Mar 2004, 01:23
given 2x^2 = 18 find 2x^2/x^3

2/x = 2/3 E it is
Senior Manager
Joined: 05 Feb 2004
Posts: 290
Location: USA

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27 Mar 2004, 06:57
How can 2x^2 be 18..............isn't it 18 cubic feet.......can anyone clarify??
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4288

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27 Mar 2004, 07:06
Agree with 2/3
The base of the cube is X * X = X^2
The height of cube to which water is filled is 2. We can then find X with equation 2*X^2 = 18 --> X = 3
2X^2 / X^3 = 2/X = 2/3
Took me 1 min.
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Best Regards,

Paul

Senior Manager
Joined: 05 Feb 2004
Posts: 290
Location: USA

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27 Mar 2004, 07:07
Paul, thanks...........I understand now!!
27 Mar 2004, 07:07
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