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A sample pitch blende is found to contai...

A sample pitch blende is found to contain `50%` Uranium `(U^(238)) and 2.425%` Lead. Of this Lead only `93%` was `Pb^(206)` isotope, if the disintegration contant is `1.52 xx 10^(–10) yr^(–1)`. How old could be the pitch blende deposit.

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The correct Answer is:
`3.33 xx 10^(8)` years
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