Correct Answer - Option 3 : 50000

__Concept:__

The relation between E, G, μ, and K will be

E = 2G(1 + μ),

E = 3K(1 – 2μ)

Where E = Young’s Modulus, G = Modulus of Rigidity, μ = Poisson ratio, K = Bulk modulus of Elasticity.

__Calculation:__

__Given:__

E = 130 GPa = 130 × 10^{3} MPa, μ = 0.3

E = 2G (1 + μ)

130 × 103 = 2G (1 + 0.3)

**G = 50000 MPa**

**∴ the modulus of rigidity of steel in** 50000 MPa.