A submarine pressure hull in the form of a circular cylinder is of external diameter $10$ m and length $200$ m$.$ It dives to the bottom of the Mariana Trench which is $11\mathrm{.}52$ km deep. What will be the mass of water acting on the submarine$$s circular surface in terms of the number of London double$-$decker buses, given that the mass of a London double$-$decker bus is $7$ tonnes. Assume that the density of water, $\backslash$rho $=1020$ kg$/$m$3$ and gravitational acceleration, g $=9\mathrm{.}81$ m$/$s$2.$

$($Take the gravitational acceleration$$as$9\mathrm{.}8$m$/$s$2)$