SOLUTION: cuba a has an edge length of 2 inches. cube b has an edge length double that of cube a. what is the volume, in cubic inches, of cube b? a.4 b.8 c.16 d.32 e.64

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Question 549897: cuba a has an edge length of 2 inches. cube b has an edge length double that of cube a. what is the volume, in cubic inches, of cube b?
a.4
b.8
c.16
d.32
e.64

Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
If you have two similar solids, one a larger version of the other, and the ratio of the corresponding lengths is x, the ratio of corresponding areas is x%2Ax=x%5E2, and the ratio of corresponding volumes is x%2Ax%2Ax=x%5E3.
So the answer is 2%5E3=2%2A2%2A2=8.
This is how the large cube would look if you made it out of the smaller cubes.
You would have 8 small cubes: two layers of 4 cubes, one on top of the other,
Each edge of the large cube is 2 times as long as the edge of a small cube.
Each face of the large cube has 4 times the area of the face of a small cube.
The large cube has 8 times the volume of a small cube.