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For a substance, the average life for al...

For a substance, the average life for `alpha-"emisssion"` is 1620 yr and `beta-"emisssion"` is 405 yr. After how much time the `(1)/(4)` of the material remains aftre `alpha` and `beta-"emisssion"`

A

1500 years

B

300 years

C

449 years

D

810 years

Text Solution

Verified by Experts

The correct Answer is:
C
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