Abstract
In this paper we investigate the Λ-CDM universe by selecting the specific time dependent form of Λ, viz.
, in the context of 5-dimensional space time. Time-dependent form of equation of state parameter
w
is derived along with a possible signature flip of deceleration parameter
q
. It is also observed that a present age of the Universe, calculated for some specific values of parameter agrees very well with the observational data.