57. A venturi meter installed horizontally is used to measure to flow of water in a pipe. The area ratio, A2/A, of the meter is 0.50, and the velocity through the throat of the meter is 3 m/s. What is the most __ nearly the pressure differential meter? A. 1.5 kPa B. 2.3 kPa across the venture 3.5 = 3.5 kPa 3.375 D. 6.8 kPa