If E is the modulus of elasticity of the concrete in kg/cm 2 , d is the slab thickness in cm, is the Poisson's ratio for the concrete, k is the sub-grade modulus kg/cm 3 , the radius r of relative stiffness in cm, Options: A . &nbsp`root [4]((Ed^3)/(12(1 - mu^2)K)` B . &nbsp`root [4]((Ed^3)/(12(1 + mu^2)K)` C . &nbsp`root [4]((Ed^2)/(12(1+mu^2)K)` D . &nbsp`root [4]((Ed^2)/(12(1 - mu^2)K)`

Question

If E is the modulus of elasticity of the concrete in kg/cm², d is the slab thickness in cm, is the Poisson's ratio for the concrete, k is the sub-grade modulus kg/cm³, the radius r of relative stiffness in cm,

Options:

A . `root [4]((Ed^3)/(12(1 - mu^2)K)`

B . `root [4]((Ed^3)/(12(1 + mu^2)K)`

C . `root [4]((Ed^2)/(12(1+mu^2)K)`

D . `root [4]((Ed^2)/(12(1 - mu^2)K)`

Answer: Option A

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