#### Strenght of Materials

Q.

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body)

A. (P.l.A)/(E)
B. (P.l)/(A.E)
C. (E)/(P.l..A)
D. (A.E)/(P.l)