What is the volume of a rectangular prism that is 3 m long, 5 m wide, and 2 m high?

To calculate the volume of a rectangular prism, the formula used is:

Volume = Length × Width × Height.

In this case, the dimensions given are:

• Length = 3 m

• Width = 5 m

• Height = 2 m

Using the formula:

Volume = 3 m × 5 m × 2 m = 30 m³.

The proper unit for volume is cubic meters, which is denoted as m³. Therefore, the computed volume of 30 m³ indicates that the prism occupies a space of thirty cubic meters.

Thus, the correct answer is that the volume is 30 cubic metres, which confirms why the choice stating “30 cubic metres” is accurate. It conveys both the quantity and the appropriate measurement of volume.