A 4-sided pyramid is labeled with a height from the top to base of 28, length of base of 24, and width of base of 22.

Suppose a similar rectangular pyramid to the one shown has a scale factor of 23
. What would be the volume of the new pyramid?

(1 point)
Responses

3,285.33 ft.3
3,285.33 ft. cubed

2,190.22 ft.3
2,190.22 ft. cubed

1,460.15 ft.3
1,460.15 ft. cubed

182.52 ft.3

1 answer

To find the volume of a rectangular pyramid, we can use the formula:

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

First, we need to calculate the volume of the original pyramid. The dimensions of the base are given as length \( l = 24 \) and width \( w = 22 \), and the height \( h = 28 \).

  1. Calculate the base area:

\[ \text{Base Area} = l \times w = 24 \times 22 = 528 , \text{ft}^2 \]

  1. Calculate the volume of the original pyramid:

\[ V = \frac{1}{3} \times \text{Base Area} \times h = \frac{1}{3} \times 528 \times 28 \] \[ V = \frac{1}{3} \times 14784 = 4928 , \text{ft}^3 \]

Now, since the new pyramid is similar to the original pyramid with a scale factor of \( k = 23 \), the volume of the new pyramid can be calculated using the formula for similar solids:

\[ V' = k^3 \times V \]

Substituting the values we have:

\[ V' = 23^3 \times 4928 \]

  1. Calculate \( 23^3 \):

\[ 23^3 = 12167 \]

  1. Calculate the volume of the new pyramid:

\[ V' = 12167 \times 4928 \] \[ V' = 599,256 , \text{ft}^3 \]

Based on the context and your provided answers, it appears you may have a typo or misunderstanding about the scale factor or its impact. The new volume, as calculated, is much larger than any provided answer options, which might imply a smaller scale factor or a miscalculation in the previous dimensions. Please verify the values and consider if the scale factor is instead \( \frac{1}{23} \) or a smaller number. This influences the outcome significantly.

If the scale factor is indeed \( \frac{1}{23} \):

Then:

\[ V' = \left( \frac{1}{23} \right)^3 \times 4928 \] \[ V' = \frac{1}{12167} \times 4928 \approx 0.404 , \text{ft}^3 \]

Please verify the parameters you provided for accuracy.