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.(92)^(238)U by successive radioactive d...

`._(92)^(238)U` by successive radioactive decays changes to `._(82)^(206) Pb`. A sample of uranium ore was analysed and found to contain `1.0g^(238)U` and `0.1g^(206)Pb`. Assuming that `.^(206)Pb` has accumulated due to decay of uranium, find out the age of ore.
(`t_(1//2)` for `.^(238)U = 4.5xx10^(9)` year)

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The correct Answer is:
`t = 7.1 xx 10^(8)` years
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