A pipe carries flow of an oil of relative density = 0.8. A pitot static tube is inserted into the pipe to measure velocity at a point P. If a differential mercury oil gauge is connected to a Pitot-static Tube indicates a reading of 4cm, then the velocity at P, assuming coefficient of velocity of the pitot tube as 0.8, will be:
1
1 m/s
2
2.8 m/s
3
4 m/s
4
5 m/s