To determine how many times larger the volume of the saltwater tank is than the volume of the freshwater tank, we first need to calculate the volumes of both tanks.
The volume \( V \) of a cube is given by the formula:
\[ V = s^3 \]
where \( s \) is the side length of the cube.
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Calculate the volume of the freshwater tank:
The side length of the freshwater tank is 15 cm.
\[ V_{\text{freshwater}} = 15^3 = 15 \times 15 \times 15 = 3375 \text{ cm}^3 \]
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Calculate the volume of the saltwater tank:
The side length of the saltwater tank is 45 cm.
\[ V_{\text{saltwater}} = 45^3 = 45 \times 45 \times 45 = 91125 \text{ cm}^3 \]
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Now, find how many times larger the volume of the saltwater tank is compared to the freshwater tank:
\[ \text{Factor} = \frac{V_{\text{saltwater}}}{V_{\text{freshwater}}} = \frac{91125}{3375} \]
To simplify:
\[ \frac{91125}{3375} = 27 \]
Thus, the volume of the saltwater tank is 27 times larger than the volume of the freshwater tank.
The correct response is:
27