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2) In a section of horizontal pipe with a diameter of 2.4 cm, the pressure is 90 kPa and 2) water is flowing with an unkown speed. The pipe narrows to 1.2 cm, and the pressure in the narrower region is 60 kPa. What is the water flowing speed in the narrower region? Treat the water as an ideal incompressible fluid. The density of water is 1000 kg/m. A) 2.0 m/s B) 4.0 m/s C) 4.5 m/s D) 8.0 m/s E) 9.0 m/s