and currently the material has 20% of X and 80% of Y by number on the planet. The current age of the planet is

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Half lives of two isotopes X and Y of a material are known to be 2×10^9 years and 4×10^9 years respectively. Planet was formed with equal number of these isotopes, and currently the material has 20% of X and 80% of Y by number on the planet. The current age of the planet is
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Sep
Half lives of two isotopes X and Y of a material are known to be 2×10^9 years and 4×10^9 years respectively. Planet was formed with equal number of these isotopes, and currently the material has 20% of X and 80% of Y by number on the planet. The current age of the planet is and [...]
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