What is the atmospheric pressure at the top of a mountain 3 km high, if at the foot it is 750 mm of mercury?

decision
1) We translate the height of the mountain from kilometers to meters.
3 * 1000 = 3000 m.
2) We accept a change in pressure of 1 millimeter with an increase in height by 10 meters.
3) Find the difference in pressure at the top and at the bottom.
3000/10 = 300 mm Hg
4) Find the value of atmospheric pressure at the summit with a height of 3 km.
750 – 300 = 450 mm Hg
Answer: 450 mm Hg.

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