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Q.

The activity of a sample reduces from $A_{0}$ to $\frac{A_{0}}{\sqrt{2}}$ in 10 minutes. The activity of the sample after 30 more minutes will be $A_{1} .$ Find $\frac{A_{0}}{4 A_{1}} .$

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Detailed Solution

$\frac{A_{0}}{\sqrt{2}} = A_{0} . e^{- 10 λ} A_{1} = A_{0} e^{- 40 λ}$

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