Lag1989 task №3.47

Device called Pitot - Prandtl consists of two coaxial narrow tube. The inner tube is open at its lower end has an external lateral opening. The upper ends of the tubes are connected to a differential pressure gauge that measures the pressure difference p. With the fluid velocity (or gas) can be measured using this device. For this purpose, it is immersed in the liquid, drawing the open upstream end, and count p. When immersed tube Pitot - Prandtl in the fluid stream with a density of 1.1 × 10 2 kg / m3 was detected differential pressure of 4.95 * 10 3Pa. Find the velocity of fluid flow.