1.

To determine the age of stone it was analysed for the nuclei of 'B' & 'D' and were found to 10^(18)and3xx10^(18) respectively. Assuming that all the 'D' was produced by the disintegration of 'A' only, the age of the stone is [(Given : ln2=0.3,ln3=0.45]

Answer»

6930 days
10395 days
13860 days
3465 days

Solution :`t=(6930)/("In 2")"In"([B]_("INITIAL"))/([B]_("final"))=(6930)/("In 2")"In"(4xx10^(18))/(1XX10^(18))=13860" days"]`


Discussion

No Comment Found

Related InterviewSolutions