A) 2740 years
B) 274 years
C) 2780 years
D) 278 years
Correct Answer: A
Solution :
\[K=\frac{0.693}{{{T}_{1/2}}}=\frac{0.693}{5770}\] \[\therefore \] \[t=\frac{2.303}{K}\log \frac{100}{72}=\frac{2.303\times 5770}{0.693}\log \frac{100}{72}\] \[=19175.05\times (\log 100-\log 72)\] \[19175.05\times 0.143=2742.03\,\]years.You need to login to perform this action.
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