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The Hubble constant, $H_0$, sets the scale of the size and age of theUniverse and its determination from independent methods is still worthwhile tobe investigated. In this article, by using the Sunyaev-Zel`dovich effect andX-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 aflat $\Lambda$CDM model. There is a degeneracy on the mass density parameter($\Omega_{m}$) which is broken by applying a joint analysis involving thebaryon acoustic oscillations (BAO) as given by Sloan Digital Sky Survey (SDSS).This happens because the BAO signature does not depend on $H_0$. Our basicfinding 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 geometryassumed by Bonamente {\it {et al.}} is questionable, we have also compared theabove results to a recent work where a sample of triaxial galaxy clusters hasbeen considered.

New constraints on H_0 and Omega_M from SZE/X-RAY data and Baryon Acoustic Oscillations