The answer depends on what information you have been provided with. If you have only the linear dimensions then it is: Length * Breadth * Height * Density.
Chat with our AI personalities
If a rectangular solid is a cuboid, the answer is 12.
A rectangular solid is 3-dimensional, but I'm assuming you mean a 2-dimensional representation of a rectangular solid, which is called a net. Do a search for the following: "net rectangular prism" and you will see a drawing of it.
A rectangular prism.A rectangular prism.A rectangular prism.A rectangular prism.
a rectangular based pyramid
A rectangular prism or cuboid.