$f=\frac{M}{Z}=4\mathrm{.}0910$

Example $9\mathrm{.}7.$ A tube of uniform thickness $2\mathrm{.}5mm$ has sectur of $4cm.$ Find the the hollow heragon. The tube carries two low the. Find the least distance between the lo istance from the ends of the tube. $110\frac{N}{m^2}.$ Neglect the weight of the tube. anding is not to exceed hexagon,

Iution. For the $R\sqrt[\phantom{2}]{3},4\sqrt[\phantom{2}]{3}=2\sqrt[\phantom{2}]{3}cm8$