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A radioative substance decays 10% in 5 d...

A radioative substance decays 10% in 5 days. The aamount remains after 20 days is [log 3 =0.4771]

A

0.9

B

0.81

C

0.729

D

0.6561

Text Solution

Verified by Experts

The correct Answer is:
d
`lambda=2.303/tlog.N""_(0)/N`
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