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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Rahul kumar
Ans: 0.043 per day Amount of decayed material: After one half life= 50% After two half life= 75% After three half life= 87.5% As given in the question: 3 x (half life) = 48 days so, half life= 16 days Decay constant= ln2/half-life = 0.693/16 = 0.043 per day