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Fe-57 decays at the constant rate in such a way that it reduces to 50% in 5568 years. Find the age of an old rod which the iron (Fe) is only 12.5% of the original.

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MCQs on ratios and percentages, finding discounts and percentage, percentage estimations, profit and loss, sales tax or value added tax, compound interest, compound interest rates annually and compound interest formula applications.


Fe-57 decays at the constant rate in such a way that it reduces to 50% in 5568 years. Find the age of an old rod which the iron (Fe) is only 12.5% of the original.






 
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