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MHT CET202122 Sep 2021Morning ShiftMathematicsDifferential EquationsActual

Bismuth has half life period of 5 days. A sample originally has a mass of 1000 mg , then the mass of Bismuth after 30 days is

Options

  1. A16.625
  2. B13.625
  3. C14.625
  4. D15.625

Correct answer

D. 15.625

Step-by-step solution

Half life period of bismuth is 5 days. Initial mass =1000 mg Mass left after 5 days =500 mg Mass left after 10 days =250 mg Mass left after 15 days =125 mg Mass left after 20 days =62.5 mg Mass left after 25 days =31.25 mg Mass left after 30 days =15.625 mg

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