A) 200 yr
B) 250 yr
C) 100 yr
D) 150 yr
Correct Answer: A
Solution :
We know that \[\frac{N}{{{N}_{0}}}={{\left( \frac{1}{2} \right)}^{t/{{t}_{1}}/2}}\] \[\left( \frac{1}{16} \right)={{\left( \frac{1}{2} \right)}^{t/50}}\] \[t=4\times 50\] \[t=200yr\]You need to login to perform this action.
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