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A radio isotope X with a half life 1.4xx...

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

`2xx10^9` years

B

`3xx10^9` years

C

`6xx10^9` years

D

`7xx10^9` years

Text Solution

Verified by Experts

The correct Answer is:
B
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