The half lives of radioactive elements `X` and `Y` are `3` mintue and `27` minute respectively. If the activities of both are same, then calculate the ratio of number of atoms of X and Y.

Half lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. Calculate the ratio of decayed numbers of A and B nuclei after 80 minutes.

Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B nuclei will be

Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B nuclei will be :

Two radioactive elements X and Y half-live pf 50 and 100 minute respectiv ely. Intial sample of both the elements have same number of atoms. The ratio of the reamaining number of atoms of X and Y after 20 minute is:

Half - lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, The samples have equal number of nuclie. After 80 minutes ,the ratio of decayed number of A and B nuclei will be

Half - lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. . Initially . The samples have equal number of nuclie After 80 minutes ,the ratio of decyed number of A and B nuclei will be