The drainage basin of the Delaware River encompasses about 35,500 km2 (= 35 x 10^9 m^2). The average annual precipitation for the drainage area is about 44 inches/year (= ~1.1 m/yr) and the evaporation reaches 23 inches/year (= ~0.6 m/yr).
Find the flow rate from this information ^

If we have a cross-section area of 300,000m^2 near the bay bouth, what would be the average current speed through the bay mouth? Begin this part with the flow rate from the other part. (Units must be in m/s)
Thank you for the help.