A) 28 min
B) 7 min
C) 14 min
D) 20 min
Correct Answer: D
Solution :
At \[t={{t}_{2}},{{N}_{2}}=\frac{N}{3}\] (Left) \[t={{t}_{1}},{{N}_{1}}=\frac{2N}{3}\] \[\Rightarrow \,{{t}_{2}}-{{t}_{1}}=\] half life \[=20\] minYou need to login to perform this action.
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