A radio isotope `X` with a half-life `1.4 xx 10^9` years decays of `Y` which is stable
Channel: Doubtnut
Date: 2020-01-19

A radio isotope `X` with a half-life `1.4 xx 10^9` years decays of `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.