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The mean lives of a radioactive substanc...

The mean lives of a radioactive substance are 1620 years and 405 years for `alpha`-emission and `beta`-emission, respectively. Find out the time during which three fourths of a sample will decay if it is decaying both by `alpha`-emission and `beta`-emission simultaneously.

A

449.94 years

B

323 years

C

350 years

D

329.68 years

Text Solution

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The correct Answer is:
A
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