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If 20 gm of a radioactive substance due ...

If 20 gm of a radioactive substance due to radioactive decay reduces to 10 gm in 4 minutes, then in what time 80 gm of the same substance will reduce to 10 gm-

A

8 minutes

B

12 minutes

C

16 minutes

D

20 minutes

Text Solution

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The correct Answer is:
b
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