Michelle creates a cube with a height of 6 centimeters. Her friend Tasha creates a square-based pyramid with the same height and base area as Michelle’s cube. Find the volume of Michelle’s cube and use it to find the volume of Tasha’s pyramid. Show all work.

1 answer

To find the volume of Michelle's cube, we will use the formula for the volume of a cube, which is given by:

\[ V_{cube} = s^3 \]

where \( s \) is the length of one side of the cube. Since Michelle's cube has a height of 6 centimeters, and in a cube, the height is equal to the length of a side, we have:

\[ s = 6 \text{ cm} \]

Now we can calculate the volume of the cube:

\[ V_{cube} = 6^3 = 6 \times 6 \times 6 = 216 \text{ cm}^3 \]

Now, we know that Tasha's pyramid has the same height and base area as Michelle's cube. The height of Tasha's pyramid is also 6 centimeters.

Next, we need to find the base area of the cube. The base of a cube is a square, so its area is given by:

\[ \text{Base Area}_{cube} = s^2 = 6^2 = 36 \text{ cm}^2 \]

Now, let's find the volume of Tasha's pyramid. The formula for the volume of a pyramid is:

\[ V_{pyramid} = \frac{1}{3} \times \text{Base Area} \times \text{Height} \]

Substituting in the values we have:

\[ V_{pyramid} = \frac{1}{3} \times 36 \text{ cm}^2 \times 6 \text{ cm} \]

Calculating this gives:

\[ V_{pyramid} = \frac{1}{3} \times 216 \text{ cm}^3 = 72 \text{ cm}^3 \]

Thus, the volumes are:

  • Volume of Michelle's cube: \( 216 \text{ cm}^3 \)
  • Volume of Tasha's pyramid: \( 72 \text{ cm}^3 \)

Final Answer:

  • Volume of Michelle's cube: 216 cm³
  • Volume of Tasha's pyramid: 72 cm³