The half life for a-decay of uranium \,_{93}U^{228} is 4.47 × 10^8 yr. If a rock contains 60% of original \,_{93}U^{228} atoms, then its age is [take log 6 = 0.778, log 2 = 0.3]

Correct Answer is : 3.3 × 108 yr

VITEEE 2015 Paper

Section: Physics

Question : 2 of 120

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The half life for a-decay of uranium

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U228 is 4.47 × 108 yr. If a rock contains 60% of original

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U228 atoms, then its age is
[take log 6 = 0.778, log 2 = 0.3]

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