3 The half life of a radioactive isotope X is 20 yr It

Last updated: 6/8/2023

3 The half life of a radioactive isotope X is 20 yr It decays to another element Y which is stable The two elements X and Y were found to be in the ratio 1 7 in a sample of a given rock The age of the rock is estimated to be a 40 yr b 60 yr c 80 yr NEET 2013 d 100 yr