Answer
a) $9.8\times10^{4} Pa$
b) $2.0\times10^{5} Pa$
Work Step by Step
a) P= $\rho g h= 1000\,kg m^{-3}\times9.8\,ms^{-2}\times10\,m$
$=9.8\times10^{4} Pa$
b) $P= P_{a}+ \rho g h$$= 1.013\times10^{5}\,Pa+9.8\times10^{4} Pa$
$\approx2.0\times10^{5} Pa$
