Question

A man is four time as old as his son. After 16 year, he will be only twice as old as his son. Find their present age

Answer 1

Let Son's present age- x
father's age- 4x
After 16 years their ages will be:
Son's age=x+16
Father's age= 4x+16
Acc.to ques.
4x+16= 2(x+16)
4x+16= 2x+32
4x-2x=32-16
2x=16
x=16/2=8
Son's present age=8 years
Father's present age=4*8= 32years
Hope it helps