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

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

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