To calculate the volume of the upside down pyramid-shaped scuba diving lagoon, we can use the formula for the volume of a pyramid:
\[ V = \frac{1}{3} \times \text{Base Area} \times \text{Height} \]
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Calculate the base area: The base of the lagoon is a rectangle with dimensions 50 feet by 20 feet. \[ \text{Base Area} = 50 , \text{ft} \times 20 , \text{ft} = 1000 , \text{ft}^2 \]
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Determine the height: The height of the lagoon is 25 feet (the depth).
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Calculate the volume: \[ V = \frac{1}{3} \times 1000 , \text{ft}^2 \times 25 , \text{ft} \] \[ V = \frac{1}{3} \times 25000 , \text{ft}^3 \] \[ V = \frac{25000}{3} , \text{ft}^3 \approx 8333.33 , \text{ft}^3 \]
Thus, the volume of the lagoon is approximately 8,333.33 feet cubed.
The correct response is: 8,333.33 feet cubed.