Two radioactive nuclides A and B have half-lives 50 min and 10 min respectively . A fresh sample contains the nuclides of B to be eight times that of A. How much time should elapse so that the mumber of nuclides of A becomes double of B ?
a) 30
b) 40
c) 50
d) 100

Options

A. 30
B. 40
C. 50
D. 100

Answer

C