1.

A sample of rock from moon contains equal number of atoms of uranium and lead (t_(1//2)" for "U=4.5xx10^(9) years). The age of the rock would be :

Answer»

`4.5xx10^(9)` YEARS
`9.0xx10^(9)` years
`13.5xx10^(9)` years
`2.25xx10^(9)` years

Answer :A


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