A horizontal pipe of diameter 0.998 m has a smooth constriction to a section of diameter 0.5988 m. The density of oil flowing in the pipe is 821 kg/m3 .
If the pressure in the pipe is 8420 N/m2 and in the constricted section is 6315 N/m2 , what is the rate at which oil is flowing?
Answer in units of m3/s.