A radioactive element gets spilled over the floor of a room. Its half–life period is 30 days. If the initial activit

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Q 1125523461.     A radioactive element gets spilled over the floor of a room. Its half–life period is 30 days. If the initial activity is ten times the permissible value, after how many days will it be safe to enter the room?
JEE 2007
A

1000 days

B

300 days

C

 10 days

D

100 days

HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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