What is the primary method for finding the volume of a composite solid?

Averaging the volumes of its parts.

Decomposing the solid and adding the volumes of its parts.

Multiplying the volumes of its parts.

Finding the surface area of the largest part.

A composite solid is made by stacking two identical rectangular prisms. How is the total volume found?

Calculate the volume of one prism and multiply by 2.

Calculate the volume of one prism and square it.

Add the length, width, and height of one prism.

It cannot be determined without the dimensions.