What is the average velocity for the entire distance?" distance along road (metres)
220
200
180
160
140
120
100
80
60
40
20
2
3
6
5
6
11
-20
10
time (seconds)

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.