An open and wide glass tube is immersed vertically in mercury in such a way that a length of $0.05\,\text{m}$ of air extends above the mercury level. The open end of the tube is closed and the tube is raised further by $0.43\,\text{m}$. The length of the air column above the mercury level in the tube will be (take $P_{\text{atm}} = 76\,\text{cm}$ of mercury)