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Tanush choudhary

· started a discussion

· 1 Months ago

question is wrong (Question:524959.0)

there should be 4 instead of 6

Question:

A radio-active substance has a half life of four months. Three-fourth of the substance will decay in ______ .

Options:
A)

Six months

B)

Ten months

C)

Eight Months

D)

Twenty four months

Solution:

Ans: (c) A half-life of 4 months means the radioactive substance reduces to half in 4 months. Thus in another 4 months the substance reduces to half its present value, i.e. 3/4 of the substance decays in 8 months. The substance continues to decay to half its quantity in its half-life.

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