Problem 711 | Cantilever beam with free end on top of a simple beam

Problem 711
A cantilever beam BD rests on a simple beam AC as shown in Fig. P-711. Both beams are of the same material and are 3 in wide by 8 in deep. If they jointly carry a load P = 1400 lb, compute the maximum flexural stress developed in the beams.

The ends of cantilever beam rests on top of simple beam at the third point.