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If the half-life of a material is 10 yr, then in what time, it becomes 1/4th part

If the half-life of a material is 10 yr, then in what time, it becomes 1/4th part of the initial amount

Options

(a) 15 yr
(b) 20 yr
(c) 25 yr
(d) 30 yr

Correct Answer:

20 yr

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

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