A rectangular cross section wood beam, with dimensions $160240m{m}^2$ and maximum

allowable stress ${}_a=10\frac{N}{m}{m}^2$ can be positioned in two ways, as seen in the figure.

Calculate the bending moments which can be carried by the beam in the two positions.

$[$Ans$.$: $15\mathrm{.}36kNm$;$10\mathrm{.}24kNm]$