Question: A simple beam ABC having rectangular cross sections with constant height and varying width bx supports a concentrated load P acting at the midpoint (see

A simple beam ABC having rectangular cross sections with constant height and varying width bx supports a concentrated load P acting at the midpoint (see figure).
How should the width bx vary as a function of in order to have a fully stressed beam? (Express bx in terms of the width bB at the midpoint of the beam.)

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