Atmospheric pressure at point A 790 mm at point B 810 mm determine the absolute height

Atmospheric pressure at point A 790 mm at point B 810 mm determine the absolute height and relative height of 2 points.

We accept atmospheric pressure above the sea surface as 760 mm Hg.

This pressure is constant at 0 meters above sea level.

Find the pressure difference between sea level and point A.

790 – 760 = 30 mm Hg

Since the pressure changes by 1 mm Hg. with a change in height by 10 meters, we get:

30 * 10 = 300 meters below sea level.

For point B.

810 – 760 = 50 mm Hg

50 * 10 = 500 meters below sea level.

The relative heights of the two points will be:

For B.

500 – 300 = 200 meters below point A.

For point A.

200 meters above point B.