Published by:
CGP EDU Academic Team
Published on: August 14, 2026
An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half-life 18 days inside the laboratory. Tests revealed that the radiation was 64 times more than the permissible level required for safe operation of the laboratory. What is the minimum number of days after which the laboratory can be considered safe for use?
Text Solution
Verified by ExpertsThe correct answer is:
C
Initial activity 
Time required = 6 half lives
= 6 x 18 days
= 108 days.
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