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MHT CET Physics question

PhysicsNucleiMHT CET

The half-life of a radioactive substance is 20 min. The time taken between 50% decay and 87.5% decay of the substance will be

Answer: (D)

Solution

50% decay leaves and 87.5% decay leaves , i.e. two further half-lives, so the time is

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Question ID VK-084862