  The Hubble constant, $H_0$, sets the scale of the size and age of the
Universe and its determination from independent methods is still worthwhile to
be investigated. In this article, by using the Sunyaev-Zel`dovich effect and
X-ray surface brightness data from 38 galaxy clusters observed by Bonamente
{\it{et al.}} (2006), we obtain a new estimate of $H_0$ in the context of a
flat $\Lambda$CDM model. There is a degeneracy on the mass density parameter
($\Omega_{m}$) which is broken by applying a joint analysis involving the
baryon acoustic oscillations (BAO) as given by Sloan Digital Sky Survey (SDSS).
This happens because the BAO signature does not depend on $H_0$. Our basic
finding is that a joint analysis involving these tests yield $H_0=
0.765^{+0.035}_{-0.033}$ km s$^{-1}$ Mpc$^{-1}$ and
$\Omega_{m}=0.27^{+0.03}_{-0.02}$. Since the hypothesis of spherical geometry
assumed by Bonamente {\it {et al.}} is questionable, we have also compared the
above results to a recent work where a sample of triaxial galaxy clusters has
been considered.
