A rectangular prism has a base area of 25 in.2 and a volume of 125 in.3. If a rectangular pyramid has a congruent base and height congruent to the prism, what is the height of the pyramid?(1 point)

in.

1 answer

To find the height of the rectangular pyramid, let's first recall the formulas for the volume of a prism and a pyramid.

The volume \( V \) of a prism is calculated using the formula: \[ V = \text{Base Area} \times \text{Height} \]

For the rectangular prism, we have: \[ V_{\text{prism}} = 125 , \text{in}^3 \] \[ \text{Base Area} = 25 , \text{in}^2 \] Let \( h_p \) be the height of the prism (which is equal to the height of the pyramid). Therefore, we can set up the equation: \[ 125 = 25 \times h_p \]

To find \( h_p \), we can solve for it: \[ h_p = \frac{125}{25} = 5 , \text{in} \]

Now, we have the height of the pyramid: \[ h_p = 5 , \text{in} \]

Next, we calculate the volume of the pyramid. The volume \( V \) of a pyramid is given by the formula: \[ V = \frac{1}{3} \times \text{Base Area} \times \text{Height} \]

Since the base area and height of the pyramid are congruent to those of the prism, we substitute: \[ V_{\text{pyramid}} = \frac{1}{3} \times 25 \times 5 \] \[ V_{\text{pyramid}} = \frac{1}{3} \times 125 = \frac{125}{3} , \text{in}^3 \]

Despite calculating the volume of the pyramid, remember, the question asked for the height of the pyramid, which, as derived, is: \[ \text{Height of the pyramid} = 5 , \text{in} \]

Thus, the final answer is: \[ \boxed{5} \]