(Solved): please help, i will like if its right 19. Elongation of a Rod 10 pts possible The radius of a rod is ...

19. Elongation of a Rod 10 pts possible The radius of a rod is $$0.259\mathrm{cm}$$, the length of aluminum part is $$1.3\mathrm{m}$$ and of the copper part is $$2.74\mathrm{m}$$. Determine the elongation of the rod if it is under a tension of $$9100\mathrm{N}$$. Young's modulus for aluminum is $$7\times 10^{10}\mathrm{Pa}$$ and for copper $$1.1\times 10^{11}\mathrm{Pa}$$. Answer in units of $$\mathrm{cm}$$.