A solution containing active cobalt `._(27)^(60)Co` having an activity of `0.8muCi` and decay constant `lambda` is injected in an animal's body. When `1cm^(3)` blood is drawn from the animal's body after 10 h of injection, the activity was found to be 300 dpm (decays per minute), then the total volume of blood in the animal's body is close to `[1 Ci=3.7xx10^(10)"dsp (decays per second) and at t = 10 h the value of "e^(-lambdat)=0.84]`
A
6 litres
B
5 litres
C
7 litres
D
4 litres
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The correct Answer is:
B
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