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A substance ''A'' decomposes in solution...

A substance `''A''` decomposes in solution following the first order kinetics. Flask `I` contains `L` of `1 M` solution of `A` and falsk `II` constains `100 mL` of `0.6 M` solution. After `8 hr`, the concentration, of `A` in flask `I` becomes `0.25 M`. What will be the time for concentration of `A` in flask `II` to become `0.3 M` ?

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