Let AB be the rod and let C be the point at which the weight is hung.

(a) Stress in steel wire = T_{1}/0.1

Stress in brass wire = T_{2}/0.2

As the two stresses are equal,

Taking moments about C,

Equations (i) and (ii) give

(b) Strain = Stress/y = T/Ay

As the strains in both wires are equal,