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The half life of a radioactive element which has only $\frac{1}{32}$ of its original mass left after a lapse of 60 days is

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64 days

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detailed solution

Correct option is A

N032=N01260/T⇒5=60T⇒T=12 days

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The half life of a radioactive element which has only 132 of its original mass left after a lapse of 60 days is

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The half life of a radioactive element which has only $\frac{1}{32}$ of its original mass left after a lapse of 60 days is