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The barometric pressure at sea level is 760 mm of Mercury while that on a mountain top is 715 mm. If the density of air is assumed constant at 1.2 kg/m^3 , what is the elevation of the mountain top?

(a) 510 m

(b) 1020 m

(c) 255 m

(d) 128 m

The question was posed to me in an online quiz.

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

1 Answer

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Best answer
Right option is (a) 510 m

The explanation: Gauge pressure at any height h = pressure at sea level – pressure at that height

                                                                        h=(9.81*13600*0.76)-9.81*13600*0.715)/1.2*9.81

  =510 m.

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