A father says to his son, “7 years ago my age was 7 times of your age at that time and after 3 years my age will be thrice of your age.” The present age of the son is:
1
15 years
2
12 years
3
21 years
4
24 years
A father says to his son, “7 years ago my age was 7 times of your age at that time and after 3 years my age will be thrice of your age.” The present age of the son is: