What is the volume of a device box measuring 3 in. x 2 in. x 2.5 in.?

To determine the volume of a device box, you multiply its length, width, and height together. For a box measuring 3 inches, 2 inches, and 2.5 inches, the calculation would be:

Volume = Length × Width × Height

Volume = 3 in. × 2 in. × 2.5 in.

Calculating this step-by-step:

1. Multiply the first two dimensions:

3 in. × 2 in. = 6 square inches.

2. Then multiply the result by the third dimension:

6 square inches × 2.5 in. = 15 cubic inches.

Thus, the volume of the device box is 15 cubic inches. This is the correct choice and illustrates a fundamental principle of geometry where the volume of a rectangular prism is found by multiplying its three dimensions. Consequently, understanding these calculations is essential for any practical applications in electrical work or device installation.