The two cubes are similar in shape. Compare the volume of the two and determine the scale factor from the smaller cube to the larger cube. Enter your response as a fraction. (1 point) V- 512 m V - 1728 m

1 answer

To compare the volumes of the two cubes and determine the scale factor from the smaller cube to the larger cube, we start by identifying the volumes provided:

  • Volume of the smaller cube (V₁) = 512 m³
  • Volume of the larger cube (V₂) = 1728 m³

The formula for the volume \( V \) of a cube in terms of its side length \( s \) is:

\[ V = s^3 \]

To find the side lengths of the smaller and larger cubes, we take the cube root of their respective volumes.

  1. Finding the side length of the smaller cube: \[ s_1 = \sqrt[3]{512} = 8 , \text{m} \]

  2. Finding the side length of the larger cube: \[ s_2 = \sqrt[3]{1728} = 12 , \text{m} \]

Next, we can determine the scale factor from the smaller cube to the larger cube by forming the ratio of the side lengths:

\[ \text{Scale factor} = \frac{s_2}{s_1} = \frac{12}{8} = \frac{3}{2} \]

To find the relationship between the volumes, note that when two similar cubes have a scale factor of \( k \), the ratio of their volumes is given by \( k^3 \):

\[ \left(\frac{12}{8}\right)^3 = \left(\frac{3}{2}\right)^3 = \frac{27}{8} \]

To summarize:

  • The volume of the smaller cube is \( 512 \) m³.
  • The volume of the larger cube is \( 1728 \) m³.
  • The scale factor from the smaller cube to the larger cube is \( \frac{3}{2} \).

Thus, the scale factor is \( \frac{3}{2} \) as a fraction.