Question

 A solution containing active cobalt having activity of and decay constant is injected in an animal's body. If of blood is drawn from the animal's body after hrs of injection, the activity found was decays per minute. What is the volume of blood that is flowing in the body? ( decay per second and at )

A

litres

B

litres

C

litres

D

litres

Medium
JEE Mains
Updated on : 2022-09-05
Solution
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Correct option is D)

The activity equation can be written as 
given that
Putting the values,
 Let the volume of the blood flowing be V,
the activity would reduce by a factor of
Hence
(Both R.H.S. and L.H.S. are decay/s)
Putting the values of and we get
                        

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