  The present work deals with three alternative generalized Bekenstein-Hawking
formulation of thermodynamical parameters namely entropy and temperature for
the universal thermodynamical system bounded by a horizon in the frame work of
inhomogeneous perfect fluid Lemaitre-Tolman-Bondi (LTB) model of the Universe.
For the first choice, the first law of thermodynamics holds only for the
trivial de Sitter case of the LTB model while we need restriction on the
evolution of the horizon radius for the validity of the generalized second law
of thermodynamics. However, for the other two choices, the first law of
thermodynamics holds with some specific (integral) form of the parameters
involved but for generalized LTB models.
