Question

A certain radioactive material is known to decay at a rate proportional to the amount present. Initially there is of the material present and after two hours it is observed that the material has lost 10%of its original mass, then the

A

mass of the material after four hours is

B

mass of the material after four hours is

C

time at which the material has decayed to half of its initial mass (in hours) is

D

time at which the material has decayed to half of its initial mass (in hours) is

Hard
Updated on : 2022-09-05
Solution
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Correct option is D)







             ......(1)
At



       ......(2)
At

When

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