A rectangular tank $5$m wide $3$m long and $2\mathrm{.}5$m high.

Contains water for a depth of $2$m$.$

$(18)$ Determine the greatest acceleration In which the tank maybe subjected so that no water will be spilled out if it is opened

A$.1\mathrm{.}342$ m$/$s$^2$

B$.2\mathrm{.}560$ m$/$s$^2$

C$.3\mathrm{.}270$ m$/$s$^2$

D$.4\mathrm{.}215$ m$/$s$^2$

$(19)$ Determine also the accelerating force on the fluid mass.

A$.98\mathrm{.}100$ kN

B$.88\mathrm{.}100$ kN

C$.78\mathrm{.}100$ kN

D$.68\mathrm{.}100$ kN

$(20)$ This time the tank is closed and is accelerated by $4$m$/$s$^2,$ and subjected now to a pressure of $200$kPa abs$.$ determine the total uplift pressure in the lid of the tank.

A$.2471\mathrm{.}241$ kN

B$.3000\mathrm{.}826$ kN

C$.3401\mathrm{.}215$ kN

D$.3800\mathrm{.}281$ kN