, two radioactive substances A and B have equal activities. The ratio 
of their activities after time t itself decays with time t as 
. If the half-life of A is ln2, the half-life of B is- [JEE Main 09-Jan-2019 Evening]
A)
B)
C) 2 ln 2
D)
Correct Answer: A
Solution :
[a]  |
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