A cup of coffee take a time ' t' to cool from \(90^{\circ} \mathrm{C}\) to \(80^{\circ} \mathrm{C}\) in a surrounding of \(20^{\circ} \mathrm{C}\). If a similar cup of coffee is cooled from \(80^{\circ} \mathrm{C}\) to \(60^{\circ} \mathrm{C}\) in the same surrounding, it takes a time

(Shift - II Memory Based)

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A cup of coffee take a time ' t' to cool from \(90^{\circ} \mathrm{C}\) to \(80^{\circ} \mathrm{C}\) in a surrounding of \(20^{\circ} \mathrm{C}\). If a similar cup of coffee is cooled from \(80^{\circ} \mathrm{C}\) to \(60^{\circ} \mathrm{C}\) in the same surrounding, it takes a time

(Shift - II Memory Based)

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A cup of coffee take a time ' t' to cool from \(90^{\circ} \mathrm{C}\) to \(80^{\circ} \mathrm{C}\) in a surrounding of…

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