Question

The half life period of a radioactive substance is 60 days The time taken for $\frac{7}{8}$ th of its original mass to disintegrate will be :

• A. 120 days
• B. 130 days
• C. 180 days
• D. 20 days

Answer 1

Answer: (C)

180 days

Answer 2

From the given options the correct answer is option (C): 180 days