81. A rubber pipe of density

A rubber pipe of density 1..5×10³ N/m²  and Young’s modulus  is  5×10⁶ N/m² suspended from the roof. The length of the pipe is 8 m. What will be the change in length due to its own weight

(a)  9.6 m                                               (b) 9.6×10³ m

(c)  19.2×10^-2 m                                   (d) 9.6×10² m

Answer-d

(48)