Based on the given system and the following properties, find the volumetric flow rate $($gallons $/$ minute$)$ in the system.

$V1=V2=0$;$P1=P2=0$ psig ; pipe length $=1000ft$; pipe roughness $=0\mathrm{.}0018in.$ pipe diameter $=2$ in fluid properties: viscosity $=1cp$; density $=62\mathrm{.}3lb\frac{m}{?}f{t}^{{?}^{{?}^{?}}}3$

height of upper tank is $z=40ft$;

Enter the number only in the space below without the associated units.