NEET Physics Nuclei Questions Solved

A and B are two radioactive substances whose half-lives are 1 and 2 years respectively. Initially 10 g of A and 1 g of B is taken. The time (approximate) after which they will have same quantity remaining is (a) 6.62 yır (c) 3.2 yr (b) 5 yr (d) 7 yr
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