A radioactive isotope X with half-life `1.5xx10^(9)` yr decays into a stable nucleus Y .A rock sample contains both elements X and Y in the ratio 1 : 15. They age of the rock is

A radioactive isotope X with half-life 1.5xx10^9 y decays into a stable nucleus Y. A rock sample contains both elements X and Y in ratio 1:15. Find the age of the rock .

A radio isotope X with a half life 1.4xx10^(9) yr 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

A radio isotope X with a half life 1.4xx10^(9) yr 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

A radio isotope X with a half life 1.4xx10^(9) yr 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

A radioisotope Y with half-life 1.4xx10^9 years decays to X 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 × 10^9 years. (B) 3.92 × 10^9 years. (C) 4.20 × 10^9 years. (D) 8.40 × 10^9 years.

The radioactive isotope X with a half-life of 10^(9) decays to Y which is stable. A sample of rocks was found to contain both the elements X and Y in the years ratio 1: 7 . If initially, the quantity of Y in the rock was zero, then the age of the rocks is

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.

A radio isotopesX with a half life 1.4xx10^9 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: