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Radioactivity – 4

4. A and B are two radioactive substance whose half lives are 1 and 2 years respectively. Initially 10g of A and 1g of B is taken. The time after which they will have same quantity remaining is :

(a) 3.6 years
(b) 7 years
(c) 6.6 years
(d) 5 years

Answer : (c)

Explanation : No answer description available for this question. Let us discuss.

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