Water flows through a horizontal pipe with a diameter of 10 cm at a speed of 2 m/s. The pipe narrows to a diameter of 6 cm at a certain point, and the pressure at this point is 300 kPa. What is the speed of the water at this point if the pressure at the wider section of the pipe is 400 kPa? Assume that the fluid is incompressible and that there is no friction or other losses.