Determinant of the height of the mountain if the barometer shows at the foot of 760 mm Hg. at the top 670 mm Hg

With small rises, on average, for every 12 m of rise to the height, the pressure decreases by 1 mm Hg, a smaller layer of the atmosphere produces pressure.
Atmospheric pressure equal to the pressure of a column of mercury 760 mm is considered normal and equal to 101300 Pa.
Let’s find the change in atmospheric pressure:
Δp = p0-p1 = 760-670 = 90 mm Hg
To determine the change in altitude, it is necessary to multiply the change in pressure by 12 meters:
Δh = Δp * 12 = 90 * 12 = 1080 m.
The change in height is the height of our mountain.
Answer: the height of the mountain is 1080 meters.