The half life period of a radioactive ma...

The half life period of a radioactive material is 15 minutes. What percent will remain after 45 minutes ?

A

`10%`

B

`12.5 %`

C

`15%`

D

`17.5 %`

Verified by Experts

The correct Answer is:

B

`N= N_(0)/2^n and n = 45/15 = 3 `
Also use `N_0 = 100 ` than `N = (100)/(2^3)= 12.5 %`

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