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     EduGorilla 
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    The half-life of radioactive Radon is 3.8days. The time at the end of which 1 / 20th of the Radon sample will remain undecayed is (givenlog10e=0.4343)

    Options :-

    1. 13.8 days

    2. 16.5 days

    3. 33 days

    4. 76 days

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