At the top of a mountain a thermometer reads $7°C$ and a barometer reads $70\, cm$ of $Hg.$ At the bottom of the mountain these read $27°C$ and $76 \,cm$ of $Hg$ respectively. Comparison of density of air at the top with that of bottom is
A$75/76$
B$70/76$
C$76/75$
D$76/70$
Medium
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A$75/76$
a Ideal gas equation in terms of density $\frac{{{P_1}}}{{{\rho _1}{T_1}}} = \frac{{{P_2}}}{{{\rho _2}{T_2}}} = $ constant
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