That depends on what the question is. If you want the area of a rectangle, you simply multiply length x width. But with a rectangular box, to know the volume for example, you need three numbers (length, width, height).
Subtract the square of the width from the diameter. The square root of that is the length.
Length = Volume divided by (Width X Heigth)
area of an box is length x width.
length x width x height easy
You need the total volume as well, then divide that successively by width and length
Multiply length x width.
Subtract the square of the width from the diameter. The square root of that is the length.
Length = Volume divided by (Width X Heigth)
area of an box is length x width.
Volume = Length * Width * Height.
length x width x height easy
you multiply the length times width times height.
8000
You need the total volume as well, then divide that successively by width and length
A rectangle has only two dimensions, for example, length and width. If you multiply that, you get the area. A rectangular box has a length, width, and height. If you multiply all three, you get the volume.
The volume of a rectangular prism (a shape like box)
You can't, unless it's a cube.