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in Fluid Mechanics by (118k points)
Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm2 and temperature is 25℃ assuming air is incompressible. Take density of air as 1.2 kg/m3. Neglect variation of g.

(a) 4.98 N/cm^2

(b) 2.49 N/cm^2

(c) 1.24 N/cm^2

(d) None of the mentioned

I had been asked this question in an interview for job.

This question is from Pressure at a Point in Compressible Fluid in chapter Pressure and Its Measurement of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Correct answer is (b) 2.49 N/cm^2

For explanation I would say: Pressure= p – density of air*g*height

                                    =101450-9.81*1.2*6500

                                    = 2.49 N/cm^2.

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