The count rate of a 10 ml radioactive liquid is C. Some of the liquid is now discarded. The count rate of the remaining liquid is found to be C/10 after three half-lives. Calculate the volume of the remaining liquid (in-ml)
for 10 ml sample
For 10 ml sample after three Half life =
Suppose the amount of liquid left after removing some liquid = x ml
For x ml sample the activity after three half lives
X= 8 ml
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