Question

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2. The height at which the atmosphere ceases to exist
is about 80km. If the atmospheric pressure on the
ground level is 760 mmHg, the pressure at a height of
20 km above the ground level is A. 380 mm Hg B.
570 mm Hg C. 190 mm Hg D. 480 mm Hg.​

Answer 1

Answer:

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Answer 2

Answer:

570

Explanation:

(p – 760)/(0 – 760) = (h – 0)/(80 – 0)

∴ (p – 760)/-760 = (20 – 0)/80

80(p-760) = -760(20-0)

∴80p – 60800 = -15200

80p = 60800 – 15200

80p = 45600

∴ p = 45600/80

p = 570mmHg