2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57789We study a multiply warped product manifold associated with the Reissner-Nordstrom-AdS metric to investigate the physical properties inside the black hole event horizons. Our results include various limiting geometries of the RN, Schwarzschild--AdS and Schwarzschild space-times, through the successive truncation procedure of parameters in the original curved space.10 pagesMathematical Physics83C57;83F05text