What is the height of the hill if the atmospheric pressure is 760 mm Hg at its foot and 750 mm Hg at the top?

1. Let us determine by how many millimeters of mercury the atmospheric pressure decreased with an ascent to the top of the hill, if the pressure is 760 at the foot, and 750 millimeters of mercury at the top of the hill:

760 – 750 = 10 mm Hg. Art.

2. We find out what is the height of the hill, if the difference in atmospheric pressure at the foot and at the top r is 10 millimeters of mercury, and the pressure drops by one millimeter of mercury with a rise every ten and a half meters:

10 * 10.5 = 105 m.

Answer: The height of the hill is 105 meters.