A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and the difference in water level between them is 2.0 m. Find the velocity, vm (in m/s), and the volumetric flow rate, Q (in m3/s), of the water in the main.

Question

vm=

Q=

Answer 1

vm = 2.213594362
Q = 0.278168471

Answer 2

Can you plz give the formula??

Answer 3

wrong

Answer 4

vm : 0.39597
Q : 0.04972