Situation $1-$ An open vessel $2m3m$ high has a draft of $0\mathrm{.}60$ m in fresh

water. A small orifice having a diameter of $40$ mm is installed at the

bottom of the vessel. $C=0\mathrm{.}65.$

How fast is the water getting inside the tank in $\frac{N}{s}.$

A$.24\mathrm{.}74$

B$.42\mathrm{.}63$

C$.46\mathrm{.}53$

D$.27\mathrm{.}47$

How long will the vessel sink by $0\mathrm{.}20$ m following an opening of the

orifice at the bottom?

A$.428\mathrm{.}57$ s

B$.482\mathrm{.}3$ s

C$.475\mathrm{.}6$ s

D$.451\mathrm{.}3$ s

After how many seconds will the vessel sink following an opening of

the orifice at the bottom?

A$.900\mathrm{.}2$ s

B$.810\mathrm{.}2$ s

C$.857\mathrm{.}14$ s

D$.857\mathrm{.}7$ s