JEE Main 15 Apr 2018 Shift 1 Solved Paper

A solution containing active cobalt 2790Co having activity of 0.8µCi and decay constant λ is injected in an animal’s body.If 1cm3 of blood is drawn from the animal’s body after 10 hrs of injection, the activity found was 300 decays per minute. What is the volume of blood that is flowing in the body ?(1Ci=3.7×1010 decays per second and at t =10 hrs e−λt=0.84)