Difficult# Bernoulli's Equation and the Volume Flow Rate

CLMECH-MAWKMZ

A pipe carrying an ideal fluid of density $\rho$ begins with a cross-sectional area, $A$, then expands to twice its original diameter. The pressure in the expanded section is three times the pressure in the narrower section.

What is the volume flow rate, $R$, of the fluid? The volume flow rate is defined as the volume of fluid that passes a point in the pipe per second.