The mother is 60 years old and the son is 12 years old.
5 years ago their age sum was 62.
Now after 5 years their age sum is 72(62+5(mothers) + 5(Sons)
so now if the mother is 5 times the age of the son then,
their age ratio is 1x:5x . so to find their age = 1+5=6
so 72/6 = 12 .
so the son is 12 years old (1x).
and the mother is 12 × 5 = 60 (5x).
and when you add it is 60 + 12 =72 .
I hope it will help you...
