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The length of an edge of cube Y is 2/3 the length of an edge of cube X

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The length of an edge of cube Y is 2/3 the length of an edge of cube X  [#permalink]

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New post 11 Dec 2019, 02:39
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A
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C
D
E

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Re: The length of an edge of cube Y is 2/3 the length of an edge of cube X  [#permalink]

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New post 12 Dec 2019, 12:26
Bunuel wrote:
The length of an edge of cube Y is 2/3 the length of an edge of cube X. What is the ratio of the volume of cube Y to the volume of cube X?

A. 1 to 3
B. 1 to 9
C. 1 to 27
D. 2 to 3
E. 8 to 27


Let's assume that the length of an edge of cube X is 3 cm, then the length of an edge of cube Y is 2/3 * 3 cm = 2 cm.

Then the ratio will be:
Volume of Cube Y : Volume of Cube X
2^3 : 3^3
8 : 27 (E)
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Re: The length of an edge of cube Y is 2/3 the length of an edge of cube X  [#permalink]

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New post 15 Dec 2019, 19:41
Bunuel wrote:
The length of an edge of cube Y is 2/3 the length of an edge of cube X. What is the ratio of the volume of cube Y to the volume of cube X?

A. 1 to 3
B. 1 to 9
C. 1 to 27
D. 2 to 3
E. 8 to 27


We can let the edge of cube X = 3 and the edge of cube Y = 2. The volume of cube X is 27, and the volume of cube Y is 8. Thus, the ratio is 8 to 27.

Answer: E
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Re: The length of an edge of cube Y is 2/3 the length of an edge of cube X   [#permalink] 15 Dec 2019, 19:41
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