Answer
46.19 mm Hg
Work Step by Step
We can write,
$P=h\rho g$ ; Let's plug known values into this equation.
$P=0.61\space m\times1030\space kg/m^{3}\times9.8\space m/s^{2}$
$P=6157.34\space Pa$
We know that,
$1.013\times10^{5} Pa=760\space mm\space Hg$
Let's multiply the P by conversion factor $(\frac{760\space mm\space Hg}{1.013\times10^{5}Pa})$ to convert the units
$P=6157.34\space Pa(\frac{760\space mm\space Hg}{1.013\times10^{5}Pa})=46.19\space mm\space Hg$
