A radio isotope 'X' with a half life 1.4 10 years decays to 'Y' which is...
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A radio isotope 'X' with a half life 1.4 10 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1:7. The age of the rock is : (a) 1.96 10 years (c) 4.20 10 years (b) 3.92 10 years (d) 8.40 10 years A radio isotope 'X' with a half life 1.4 10 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1:7. The age of the rock is : (a) 1.96 10 years (c) 4.20 10 years (b) 3.92 10 years (d) 8.40 10 years
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