The half life of a radioactive isotope X is 50 years. It decays to another element Y which is .....
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Date: 2024-04-01

The half life of a radioactive isotope X is 50 years. It decays to another element Y which is stable. The two elements X and Y were found
to be in the ratio of 1 : 15 in a sample of a given rock. The age of the rock was estimated to be 
(a) 150 years (b) 200 years
(c) 250 years (d) 100 years


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