Problem $3(2025)$:

Deternine the velocity $V$ in the pipe if the fluid in the pine of Bin$cdotsC$ is:

$$

$($a$)$ Atmospheric air and $h=10cm$ of water

$($b$)$ Wherer and $h=10cm$ of mercury

$($c$)$ Kerosene and $h=20cm$ of mercury

$($d$)$ Gasoline and $k=40cm$ of water