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 in short response . In a 5 th grade response

1 answer

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

\[ \text{Volume of cube} = \text{side} \times \text{side} \times \text{side} \]

Since the height of the cube is 6 centimeters, all sides are 6 cm.

So,

\[ \text{Volume of cube} = 6 , \text{cm} \times 6 , \text{cm} \times 6 , \text{cm} \]

Calculating that:

\[ 6 \times 6 = 36 \] \[ 36 \times 6 = 216 \]

So, the volume of Michelle's cube is 216 cubic centimeters.

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

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

We know that Tasha's pyramid has the same base area as the base area of Michelle's cube. The base area of the cube is:

\[ \text{Base area of cube} = \text{side} \times \text{side} = 6 , \text{cm} \times 6 , \text{cm} = 36 , \text{cm}^2 \]

Now we can plug this into the volume formula for Tasha's pyramid:

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

Calculating that:

\[ 36 \times 6 = 216 \] \[ \text{Volume of pyramid} = \frac{1}{3} \times 216 = 72 \]

So, the volume of Tasha's pyramid is 72 cubic centimeters.

In summary:

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