What is the formula for the volume of a right rectangular prism?

What is the formula for the volume of a right rectangular prism?

• A. Length × height
• B. Length × width × height
• C. Length × width
• D. Width × height

Answer: (B)

Volume measures how much space is inside a 3D object. For a right rectangular prism, you multiply its three dimensions—length, width, and height—to find that space. Think of filling the prism with unit cubes: each layer that sits on the base has an area of length × width, and there are height such layers. Multiply to get the total volume: length × width × height. The base area times height view helps see why this works. The others mix only two dimensions, which gives the area of a face, not the space inside. For a quick check, if the dimensions are 4 by 3 by 2, the volume is 4 × 3 × 2 = 24 cubic units.

Volume measures how much space is inside a 3D object. For a right rectangular prism, you multiply its three dimensions—length, width, and height—to find that space. Think of filling the prism with unit cubes: each layer that sits on the base has an area of length × width, and there are height such layers. Multiply to get the total volume: length × width × height. The base area times height view helps see why this works.

The others mix only two dimensions, which gives the area of a face, not the space inside. For a quick check, if the dimensions are 4 by 3 by 2, the volume is 4 × 3 × 2 = 24 cubic units.