A hollow alloy tube 6 m long with an external diameter of 50 mm and internal diameter of 30 mm was found to extend 2.98 mm under a tensile load of 50 kN. Find safe load on the tube used as strut of both ends pined( Up to the nearest integer value) in KN. Take the factor of safety as 3.
1
2 kN
2
5 kN
3
6 kN
4
1 kN