A bridge for a toy construction set is to be made from acetal copolymer with the flexural...

A bridge for a toy construction set is to be made from acetal copolymer with the flexural strength listed in Appendix. The cross section of one beam is shown in Figure. What maximum concentrated load could be applied to the middle of the beam if the span was 1.25 m and the ends are simply supported? Do not exceed one-half of the flexural strength of the plastic.

FIGURE