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Two substances A and B are present such ...

Two substances A and B are present such that `[A_(0)]=4[B_(0]` and half-life of A is 5 minutes and that of B is 15 minutes. If they start decaying at the same time following first order kinetics after how much time the concentration of both of them would be same ?

A

15 min

B

60 min

C

12 min

D

180 min

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The correct Answer is:
d
`N//A`
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