  In this article we find explicit formulae for spherically symmetric solutions
of the multidimensional zero-pressure gas dynamics system and its adhesion
approximation. The asymptotic behaviour of the explicit solutions of the
adhesion approximation has been studied. The radial components of the velocity
and density satisfy a simpler equation which enables us to get explicit
formulae for different types of domains and study its asymptotic behaviour. A
class of solutions for the inviscid system with conditions on the mass instead
of conditions at origin has also been analyzed.
