Q.41 In a typical human body, the amount of radioactive "K is 3.24 x 10 percent of its mass. The activity due to K in a human body of mass 70 kg is . (Round off to 2 decimal places) (Half-life of 4K = 3.942 x 106 s, Avogadro's number Na= 6.022 x 10 mol) kBq.