To find the volume of a rectangular prism, you can use the formula:
\[ \text{Volume} = \text{Length} \times \text{Width} \times \text{Height} \]
Before we calculate, let's make sure all dimensions are in the same unit. The dimensions provided are:
- Width = 10 inches
- Length = 1 foot = 12 inches (since 1 foot = 12 inches)
- Depth (Height) = 2.5 inches
Now, we can plug these values into the volume formula:
\[ \text{Volume} = 12 \text{ in} \times 10 \text{ in} \times 2.5 \text{ in} \]
Calculating this:
\[ \text{Volume} = 12 \times 10 = 120 \text{ in}^2 \]
Now, multiply that by the height (depth):
\[ \text{Volume} = 120 \text{ in}^2 \times 2.5 \text{ in} = 300 \text{ in}^3 \]
Thus, the volume of the prism is
\[ \boxed{300} \text{ in}^3. \]