Physics, 11.10.2020 03:01, moynihansavanah003

Two unknown radio-isotopes X and Y contained in a metallic sample are initially present in the ratio of 1:4. The half life of Xis 180 years and that of
Y is 80 years. Find the time after which the amounts of X and Y become
equal

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Two unknown radio-isotopes X and Y contained in a metallic sample are initially present in the rati...