The document provides information to calculate the width and depth of a rectangular beam subjected to a bending load. It is given that the beam carries a 400 N load at a 300 mm distance from its fixed end, and the maximum bending stress is 40 MPa. Using the bending stress formula and setting the section modulus equal to the product of depth and width/2, the width is calculated to be 16.5 mm and depth to be 2 * width = 33 mm.