A horizontal pipe of diameter 1.04 m has a smooth constriction to a section of diameter 0.624 m . The density of oil flowing in the pipe is 821 kg/m3 .

If the pressure in the pipe is 8980 N/m2 and in the constricted section is 6735 N/m2 , what is the rate at which oil is flowing?

Answer in units of m3/s.