Question

Two radioactive materials A and B have decay constants 10λ and λ, respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of a to that of B will be 1/e after a time:
(A) 1/11λ
(B) 1/10λ
(C) 1/9λ
(D) 11/10λ

Answer 1

Answer:

(C) 1/9λ the correct answer......

Thanks for the question..........

Answer 2

$\huge\mathtt\pink{Answer}$

Option (c) 1/9 λ is the correct answer.