$6\mathrm{.}75$ Fig. P$6\mathrm{.}75$ shows a manometer being used to indicate the pressure difference between two

points in a fabricated system. Calculate the volume flow rate of water in the system if the

manometer deflection $h$ is $250$ mm $.($This arrangement is called a venturi meter, which is often

used for flow measurement.$)$

use bernoulis equation

Figure P$6\mathrm{.}75$

Venturi meter for Problems $6\mathrm{.}75$ and $6\mathrm{.}76$