what is the formula of the area of a rectangle if height, length, width is given.

I know that the area of a rectangle is length times width.

3 answers

Is this supposed to be a question?
if you mean the area of a rectangular prism, note that it has three pairs of rectangular faces. Figure the area of each face and add 'em up.

If you mean the volume, then just multiply the three dimensions, just as you multiply the two dimensions of a rectangle.
i mean by the rectangle prism