The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3/4<sup>th</sup> of its original mass?

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Ram Sharma

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Q. The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3/4^th of its original mass?

(A) 30 days
(B) 15 days
(C) 60 days
(D) 90 days

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✅ Correct Answer: (C) 60 days

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