The sum and difference of coefficient of real & apparent expansions of a liquid are in the ratio 2:1. The ratio of coefficient of real and apparent expansions must be

γR+γaγR−γa=21 γRis coefficient of real expansion and γa is coefficient of apparent expansion γR+γa=2γr−2γa 3γa=γR ∴γRγa=31=ratio of coefficient of real and apparent expansions