Allowable stress in ductile materials is given by
1
\(\rm\frac{{Ultimate\;strength}}{{Factor\;of\;safety}}\)
2
\(\rm\frac{{Fracture\;strength}}{{Factor\;of\;safety}}\)
3
\(\rm\frac{{Yield\;strength}}{{Factor\;of\;safety}}\)
4
\(\rm\frac{{Elastic\;Limit}}{{Factor\;of\;safety}}\)
5
Question Not Attempted