Question

At sea level, the atmospheric pressure is 760 mm Hg. If the air pressure decreases by 8 mm Hg per 100 m of altitude, what is the height of a mountain where the barometer reading is 680 mm Hg.
answer is 1000m
please explain​

Answer 1

Answer:

1000m

Explanation:

initial reading = 760 mm

pressure decrease per 100m altitude = 8mm

final reading = 680 mm

difference in reading = 760 - 680 mm = 80 mm

As 8 mm decrease occurs at 100m altitude, 80 mm decrease would be in: 100*10 = 1000m altitude (as pressure is multiplied by 10 (8*10 = 80mm), altitude is also multiplied by 10).

Hence, height at 680 mm reading is at 1000m altitude.

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