Calculate what is the atmospheric pressure at the top of a 210 m hill if it is 758 mm at its foot.

To solve the problem, we must remember the following rule: with an increase in altitude for every 10 meters, atmospheric pressure drops by 1 mm Hg. Thus, in order to find out how the atmospheric pressure will change, you must perform the following action:

210 ÷ 10 = 21 mm Hg

Now we can easily calculate the atmospheric pressure at the top of the hill. It can be written like this:

758 – 21 = 737 mm Hg

Therefore, at the top of the hill, atmospheric pressure will be 737 mm Hg.