What formula is used to calculate the weight of a steel plate?

The correct formula for calculating the weight of a steel plate is derived from considering the dimensions of the plate and its material density. Specifically, the weight can be determined using the formula that incorporates the length, width, and thickness of the plate along with its density.

By multiplying the length, width, and thickness, you essentially calculate the volume of the plate (since volume is a product of three dimensions), and then by multiplying this volume by the density of the steel, you arrive at the weight. This relationship reflects the fundamental physics of weight determination, where weight is equal to the mass (which is the product of volume and density) of the object.

In the case of the other options, these either omit essential dimensions necessary to define the volume of the steel plate or incorrectly attempt to apply the concepts of weight calculation. For instance, only considering the density multiplied by length or width or height alone would fail to represent the three-dimensional structure of the plate, which is crucial for accurate weight measurements.