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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 30 - Nuclear Physics > If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decayed in 20 years will be .

If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decayed in 20 years will be .

If 10% of a radioactive substance decays in every 5 year then the percentage of the substance that will have decayed in 20 years will be