Water is falling down at the rate of 1.8 kg per minute from a vertical tube. The radius at the bottom of the tube is 0.004 m and pressure around it is 0.76m of Hg. The diameter of the tube at a height of 0.5 m from the bottom is 0.005 m. Find the pressure at that point.

# Water is falling down at the rate of 1.8 kg per minute from a vertical tube. The radius at the bottom of the tube is 0.004 m and pressure around it is 0.76m of Hg. The diameter of the tube at a height of 0.5 m from the bottom is 0.005 m. Find the pressure at that point.

1. A

0.724 m of Hg

2. B

0.824 m of Hg

3. C

0.924 m of Hg

4. D

0.624 m of Hg

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### Solution:

$\frac{\mathrm{m}}{\mathrm{t}}=\mathrm{Av\rho }={\mathrm{\pi r}}^{2}\mathrm{\rho v}$

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