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What will be the height of oil head (in the tube) equal to 4 kg/cm2 pressure while the specific density of oil is 0.8?

What will be the height of oil head (in the tube) equal to 4 kg/cm2 pressure while the specific density of oil is 0.8? Correct Answer 50 m

Concept:

Pressure due to any height of liquid h is given by

P = ρ x g x h

Where ρ = density of liquid

g = acceleration due to gravity

h = Height of liquid

Calculation:

Given,

The density of water is 1000 kg/m3.

Specific gravity = 0.8

So density = 0.8 x 1000 kg/m3 = 800 kg/m3

Pressure = 4 kg/cm2 = 4 × g = 40 × 10000 N/m2 (∵ 1 Kg = 9.81 N ≈ 10 N)

So 400000 = 800 x 10 x h

∴ h = 50 m

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