Zakariah measures a cube and a squared-based pyramid and finds that the pyramid has the same height and base as the cube. He also calculates that the volume of the cube is 30 cubic meters. What is the volume of the pyramid?(1 point)

Responses

20 cubic meters
20 cubic meters

10 cubic meters
10 cubic meters

30 cubic meters
30 cubic meters

3 cubic meters
3 cubic meters

1 answer

To find the volume of the square-based pyramid, we first need to establish the relationship between the volume of the cube and the pyramid.

The volume \( V \) of a cube is given by the formula: \[ V = s^3 \] where \( s \) is the length of a side of the cube. Given that the volume of the cube is 30 cubic meters, we have: \[ s^3 = 30 \] To find the side length \( s \), we take the cube root: \[ s = \sqrt[3]{30} \]

The volume \( V \) of a square-based pyramid is given by the formula: \[ V = \frac{1}{3} \times \text{base area} \times \text{height} \] For a square-based pyramid with the same base as the cube, the base area \( A \) is: \[ A = s^2 \] The height \( h \) of the pyramid is equal to the side length \( s \) of the cube.

Now, substituting the base area and height into the pyramid volume formula, we have: \[ V = \frac{1}{3} \times s^2 \times s = \frac{1}{3} \times s^3 \] Since we know \( s^3 = 30 \): \[ V = \frac{1}{3} \times 30 = 10 \]

Therefore, the volume of the pyramid is 10 cubic meters.

The correct response is: 10 cubic meters.