A) \[2.275\times {{10}^{3}}yr\]
B) \[3.735\times {{10}^{2}}yr\]
C) \[1.62\times {{10}^{3}}yr\]
D) \[7.28\times {{10}^{2}}yr\]
Correct Answer: A
Solution :
Key Idea: Average life\[=1.44\times \]half-life Given, half-life\[=1580\,\,yr\] \[\therefore \] Average life\[=1.44\times 1580\] \[=2275\,\,yr\] \[=2.275\times {{10}^{3}}yr\]
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