For the following data:
Modulus of elasticity of cement concrete = 2,10,000 kg/cm2,
Poisson’s ratio for concrete = 0.13,
Modulus of subgrade reaction, K = 3 kg/cm3.
The radius of the relative stiffness of 15 cm thick cement concrete slab will be:
1
67 cm
2
53.3 cm
3
87 cm
4
123 cm