A radioactive sample is emitting 64 times radiations than nonhazardous limit. if its half-life is 2 hours, after what time it becomes non-hazardous [DPMT 2005]

A radioactive sample is emitting 64 times radiations than nonhazardous

1.	A radioactive sample is emitting 64 times radiations than nonhazardous limit. if its half-life is 2 hours, after what time it becomes non-hazardous [DPMT 2005]
A.	16 hr
B.	12 hr
C.	8 hr
D.	4 hr
Answer» C. 8 hr

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A radioactive sample is emitting 64 times radiations than nonhazardous limit. if its half-life is 2 hours, after what time it becomes non-hazardous [DPMT 2005]

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