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Temperature at the foot of a mountain is...

Temperature at the foot of a mountain is `30^@C` and pressure is 760mm whereas at the top of the mountain these are `0^@C` and 710mm. Ratio of the densities of the air at the foot and the top of the mountain is ____(approx)           

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The correct Answer is:
1
`(d_1)/(d_2) = (P_1//T_1)/(P_2//T_2) = (760//303)/(710//273) ~~ 1`
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