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After 225 days the activity of a sample ...

After 225 days the activity of a sample is 4000 decay/s. The activity reduces to 2000 decay/s after another 75 days. The initial activity of the sample is

A

` 6.79 xx 10^(16) disintegration//sec`

B

` 5.79 xx 10^(15) disintegration//sec`

C

` 10 xx 10^(15) disintegration//sec`

D

none of these.

Text Solution

Verified by Experts

The correct Answer is:
A
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