Question $7\mathrm{.}4$

As the plug at point B is removed from an open top water tank, water is ejected from the opening at B $.$ The values of the parameters shown in the figure are $H=20m,=30$ and $L=2m.$ In your calculation, assume the fluid is ideal, the cross$-$sectional area at A is much larger than that at B$.$

$($a$)(10$ marks$)$ Calculate the speed of the fluid at B$.$

$($b$)$ marks$)$ Calculate the maximum height $h_{\text{m}\text{a}\text{x}}$ reached by the water stream.