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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > 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

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