A Prandtl tube (Pitot-static tube with C = 1) is used to

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A Prandtl tube (Pitot-static tube with C = 1) is used to measure the velocity of water. The differential manometer reading is 10 mm of liquid coiumn with a relative density of 10. Assuming g = 9.8 m/s², the velocity of water (in m/s) is _____ .

1. 2. 8 m/ s
2. 2 m/ s
3. 1.328 m/ s
4. 1.25m/ s

Correct Option: C

Velocity as water = C_v √2gh
C_v = 1 (Given)

h = x		s_g	- 1
		s₀

= 0.01 (10 – 1) = 0.09 m
∴ velocity of flow = √2 × 9.8 × 0.09 = 1.328 m/ s