Consider 2 bars having the same diameter D, and lengths L1 and L2 that are kept in a line. Moreover, load P is working axially on them. Which of the following options gives the CORRECT variation in the length of the bar?
1
PπD2/4E × (1/L1 + 1/L2)
2
4P/EπD2 × (L1 + L2)
3
4E/PπD2 × (L1 + L2)
4
EπD2/4P × (1/L1 + 1/1L2)