A manometer connects the wider portion of the meter to the narrower portion. The change in the fluid's speed is accompanied by a change Δp in the fluid's pressure, which causes a height difference h of the liquid in the two arms of the manometer. (Here Δp means pressure in the throat minus pressure in the pipe.) Suppose that the fluid is fresh water, that the cross-sectional areas are 84 cm² in the pipe and 28 cm² in the throat, and that the pressure is 57 kPa in the pipe and 45 kPa in the throat. What is the rate of water flow in cubic meters per second?