breaking stress given in this question is very small (8 ×106 N/m2). Typical data for steel wire is 1.2 × 109 N/m2. So breaking stress assumed to solve this question is 1,0 × 109 N/m2
if m1 = 10 kg, m2 = 20 kg, T1 = (10+w)g, T2 = (30+w)g;
Solving the above equation for W, we will get W = 20.61 kg
solving the above equationfor W, we will get W = 31.22 kg
maximum load 20.61 kg, the wire between m1 and m2 will break first.
The student should repeatation part of the question in same way