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August 23, 2014

August 23, 2014

Posted by **Anonymous** on Wednesday, May 14, 2014 at 6:34am.

Solve and proof, following problem solving rubric.

- Geometry Help & Proofs -
**Reiny**, Wednesday, May 14, 2014 at 7:24ambased on :

ratio of volumes is proportional to the cube of their corresponding sides.

so ratio of volumes:

A : B = 1 : 5

A : C = 1^3 : 2^3 = 1 : 8

B : D = 1^3 : 3^3 = 1 : 27

A/B = 1/5

B = 5A

A/C = 1/8

C = 8A

B/D = 1/27

D = 27B

ratio of volume of C :D

= 8A : 27B

= (8/27)(A/B)

= (8/27)((1/5)

= 8 : 135

check my arithmetic

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