At the top of a mountain a thermometer and `7^(0)C` and barometer reads `70 cm` of `Hg`. At the bottom of the mountain the barometer reads `76 cm` of `Hg` and termometer reads `27^(0)C`. The density of air at the top of mountain is "_" times the density at the bottom.

Options

A. `0.99`
B. `0.9`
C. `0.89`
D. `0.95`

Answer

A

Explanation

`(PV)/(T) = constant`,
`V = (m)/(d), (Pm)/(dT) = constant , (P_(1))/(d_(1)T_(1)) = (P_(2))/(d_(2)T_(2))`