If at top of a hill 2000 m above sea level, the atmospheric pressure is 50 cm of Hg and at the sea level the atmospheric pressure is 74.5 cm of Hg, and you need as much oxygen to breath at sea level a

Question

If at top of a hill 2000 m above sea level, the atmospheric pressure is 50 cm of Hg and at the sea level the atmospheric pressure is 74.5 cm of Hg, and you need as much oxygen to breath at sea level as on the top of the hill, how much faster need you breathe on the hill top?

Prashant Kotian · Accepted Answer

Correct answer: B. the mass of oxygen per breath is ∝ pressure. to keep the rate of oxygen intake constant: rate_hill × p_hill = rate_sea × p_sea → rate_hill / rate_sea = p_sea / p_hill = 74.5 / 50 = 1.49 times.

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