JEE Advanced 2016JEE Adv 2016 Paper 2, Paper 2PhysicsHardAtoms and Nuclei183× since 2002
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?