The hydrostatic blood pressure difference between the head and the feet of a boy standing…

The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.

[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2]
  • A.
    0.5 m
  • B.
    0.6 m
  • C.
    1.5 m
  • D.
    2.0 m
Correct Answer: Option C
Explanation
[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2] Pressure = pgh, where p = density, h = the height, g = acceleration of free fall due to gravity
1.6.5 x 104 = 1.1 x 103 x 10 x h
therefore h = 1.65 x 104/1.1 x 103 x 10 = 1.5m

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